1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vaselesa [24]
3 years ago
9

substitute the value of x back into the equation 3/4x+3-2x=-1/4+1/2x+5 to justify the solution what value of x is the solution ?

x=

Mathematics
2 answers:
vredina [299]3 years ago
8 0

Answer:

x = -1

Step-by-step explanation:

We can subtract the right side of the equation to get ...

\dfrac{3}{4}x+3-2x-\left(-\dfrac{1}{4}+\dfrac{1}{2}x+5\right)=0\\\\x\left(\dfrac{3}{4}-2-\dfrac{1}{2}\right)+\left(3+\dfrac{1}{4}-5\right)=0\quad\text{collect terms}\\\\-\dfrac{7}{4}x-\dfrac{7}{4}=0\quad\text{simplify}\\\\x+1=0\quad\text{multiply by $-\frac{4}{7}$}\\\\x=-1

Checking by subsitution, we have ...

... (3/4)(-1) +3 -2(-1) = -1/4 +(1/2)(-1) +5

... -3/4 +3 +2 = -1/4 -1/2 +5

... 4 1/4 = 4 1/4 . . . . . answer checks OK

miskamm [114]3 years ago
3 0

Answer:x=-1 or D

Step-by-step explanation: hope I can help!

You might be interested in
Part B: The length of rod PR is adjusted to 17 feet. If width PQ remains the same, what is the approximate new height QR of the
Alenkinab [10]

Answer:

9.64ft

Step-by-step explanation:

Since the diagram tends to form...a right angled triangle....;

with PR = 17ft...,PQ = 14ft

then to calculate the length of QR

we use the pythagoras theorem...which is only applicable to right angled triangles

PR^2 = PQ^2 + QR^2

(17)^2 = (14)^2 + QR^2

where we make QR the subject of formula;

QR^2 = (17)^2 - (14)^2

QR = square root of( 289 - 196)

QR = square root of( 93)

;Therefore the length of QR = 9.64ft

5 0
2 years ago
Read 2 more answers
How to write 3 thousand 16 tens 7 ones in standard form
kap26 [50]
<span>(3 x 1000) + (16 x 10) + (7 x 1) = 3167. In standard form, this is 3.167 x 10^3. </span>
5 0
3 years ago
F Jay makes $15 an hour, how long will it take him to earn $90?
Allushta [10]
OK my friend if you times 15 by each of the amount of hours you will find out which one it is but in this case it will be 15 times 6 hours will equal out to be $90
4 0
3 years ago
Read 2 more answers
Write the missing power of 10 in each equation.
Mrac [35]
1. 10 or 10 to the first power
2. 10000 or 10 to the fourth power
3. 100 or 10 to the second power
4. 1000 or 10 to the third power
7 0
2 years ago
In a function of the form y= ax^2 +bx + c which of the following is always true? A. If a is positive, the parabola will have a m
GuDViN [60]
A is always true

If a is negative the parabola wil have a minimum value
4 0
3 years ago
Other questions:
  • If h(x) = 6 - x, what is the value of ( h o h)(10)?
    10·2 answers
  • A thermometer shows a temperature of Negative 20 and three-fourths degrees. A chemist recorded this temperature in her notebook
    13·2 answers
  • Which place is the 7 in? 502.78 tens tenths ones hundredths
    7·2 answers
  • a baker uses 5.5 pounds of flour daily , how many ounces of flour will he use in two weeks use words numbers or pictures
    9·2 answers
  • Jen uses 8.6 gallons of gasoline to drive 164.7 miles. Which is the best estimate for thenumber of miles per gallon of gasoline
    14·1 answer
  • I don’t understand anything someone please help me :/
    7·1 answer
  • How many solutions does the nonlinear system of equations graphed below
    10·1 answer
  • FIVE<br> What is the area of a parallelogram with base length 12 m and height 9 m?
    15·2 answers
  • The length of a garden can be expressed as 2X +6 feet and the width is X +7 feet what is the perimeter of the garden what is the
    11·1 answer
  • PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!! ANYONE PLEASE I'M DESPERATE A.F
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!