All categories

3 years ago

I need help on all of these please help i’ll mark brainliest!!! -11 + x = 7X - 5

Mathematics

2 answers:

nalin [4]3 years ago

8 0

I don't know what your looking for, so be more specific, but I'm assuming your solving for x, so that's would be

x = -1

Basile [38]3 years ago

8 0

Answer:

We can simply solve all of these by simplifying them :)

1 . 13 - 4x = 1 - x =

x = 4

2 . 7a - 3 = 3 + 6a =

a = 6

3 . 5 + 2x = -2x + 6 =

x = 1/4

4 . -11 + x = 7x - 5 =

x = -1

You might be interested in

Solve by substitution -4x-2y=-12 4x+8y=-24

kykrilka [37]

I hope this helps you

-4x-2y+4x+8y= -12-24

6y= -36

y= -6

-4x-2. (-6)= -12

-4x+12= -12

-4x= -24

x=6

(6, -6)

5 0

3 years ago

Given the formula C= 1/2t(c1-c2), solve for t.

kobusy [5.1K]

Answer:

$t=\frac{2C}{c1-c2}$

Step-by-step explanation:

$C=\frac{1}{2}t(c1-c2)\\2(C)=2(\frac{1}{2}t(c1-c2))\\2C=t(c1-c2)\\\frac{2C}{c1-c2}=\frac{t(c1-c2)}{c1-c2}\\t=\frac{2C}{c1-c2}$

3 0

3 years ago

Read 2 more answers

What is the measure of XYZ ? O A. 68° O B. 22° O C. 136 O D. 34°

777dan777 [17]

C I believe i need more info on the question

3 0

3 years ago

What is the value of x? sin(x+21)°=cos(2x+21)°

qaws [65]

We know that
if sin A=cos B
then
angle A and angle B are complementary angles
so
A+B=90°

in this problem
(x+21)+(2x+21)=90-------> 3x+42=90-------> 3x=48-----> x=16°

6 0

3 years ago

ASAP I NEED THIS ANSWERED

Natalka [10]

The width of the rectangle is 9 cm.

The length of the rectangle is 34 cm.

Step-by-step explanation:

step 1 :

Let width of the rectangle be 'x'

The length of the rectangle = 7 + 3x

step 2 :

Perimeter of the rectangle = 2 (length + width)

⇒ 86 = 2 (7 + 3x + x)

⇒ 86 = 2 (7 + 4x)

⇒ 86 = 14 + 8x

⇒ 72 = 8x

x = 72/8

x = 9

∴ The width of the rectangle is 9 cm

step 3 :

The length of the rectangle = 7 + 3x

= 7 + 3(9)

= 7+27 = 34 cm

8 0

3 years ago