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artcher [175]
3 years ago
6

How do I solve 10x-3(7-2x)+18

Mathematics
2 answers:
kiruha [24]3 years ago
8 0
10x-(3x7-3x2x)+18
10x-(21-3x2x)+18
10x-(21-6x)+18
10x-21+6x+18
16x-21+18
16x-3
ra1l [238]3 years ago
8 0
First, we need to reduce the equation. To do this, we need to get rid of the parentheses. I'll start with that.

Remember that subtracting 10X-3 is the same as adding a negative number. 10X+(-3) Thus, we change the equation.

10X+(-3)(7-2X)+18

Now we multiply -3 and 7-2X. We must distribute because of the parentheses around 7-2X.

10X+[(-3)(7)+(-3)(-2X)]+18

10X+(-21)+(6X)+18

Now, we add like terms.

10X+6X+(-21)+18

16X+(-3)

16X-3

Now, if you only needed to reduce the equation, then you can stop here.

However, if the equation is equal to zero, and you need to solve for X, then you need to add 3 to both sides so that X is by itself.

16X-3+3=0+3

16X=3

Now decide both signs by 16 to solve for X.

16X/16=3/16

X=3/16

X=0.1875
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shutvik [7]

Answer:

90%

Step-by-step explanation:

convert the fraction know as a ratio to get 90%

3 0
3 years ago
Read 2 more answers
1 1/4mi = ft, can someone explain this to me
skelet666 [1.2K]
First off, we'll convert the mixed fraction to "improper" and check about, keeping in mind that, there are 5280 feet in 1mile.

\bf \stackrel{mixed}{1\frac{1}{4}~mi}\implies \cfrac{1\cdot 4+1}{4}\implies \stackrel{improper}{\cfrac{5}{4}~mi}\\\\
-------------------------------

\bf \begin{array}{ccll}
feet&miles\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
5280&1\\
f&\frac{5}{4}
\end{array}\implies \cfrac{5280}{f}=\cfrac{1}{\quad \frac{5}{4}\quad }\implies \cfrac{5280}{f}=\cfrac{\frac{1}{1}}{\quad \frac{5}{4}\quad }
\\\\\\
\cfrac{5280}{f}=\cfrac{1}{1}\cdot \cfrac{4}{5}\implies \cfrac{5280}{f}=\cfrac{4}{5}\implies \cfrac{5280\cdot 5}{4}=f\implies 6600=f
4 0
3 years ago
I don't get this... someone explain this plum thing please...... Before a plum is dried to become a prune, it is 92% water. A pr
taurus [48]

Answer:

21.74 But if it tells you to round I would round to 21 lbs

Step-by-step explanation:

its basically just a ratio of 92 to 20

92/20=4.6

92-20=72% the amount that is lost

so given that the plum is 100 lbs we know that 72% is depleted

(72/92 = .78)X100= 78 lbs depleted

Lastly 100-78 =22 for the remaining weight of the prunes.

4 0
2 years ago
Please help don’t understand
sergejj [24]

Answer:

x=35

Step-by-step explanation:

2x+15+2x-10+x=180

combine factors

5x+5=180

-5 from both sides

5x=175

divide 175/5x

x=35

8 0
2 years ago
Can someone help me? I'm trying to find the slope form of 4x + 2y = 4.
Neporo4naja [7]
Here, Equation: 4x + 2y = 4
Divide the equation by 2, 
2x + y = 2
y = -2x + 2

Now, compare the equation with y = mx + c
Here, slope (m) = -2

In short, Your Answer would be -2

Hope this helps!
4 0
3 years ago
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