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26 votes
26 votes
4(x + 7) + 2x = 10 + x
solve for x

User RjOllos
by
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1 Answer

14 votes
14 votes

Answer:

x = -18/5 (or -3.6)

Explanation:

4(x + 7) + 2x = 10 + x

1) multiply out the brackets on the left. 4 × x = 4x, 4 × 7 = 28. This gives us:

4x + 28 + 2x = 10 + x

2) We can simpify the left side by adding the x. 4x + 2x = 6x. So:

6x + 28 = 10 + x

3) Subtract 10 on both sides as we want all numbers on one side.

6x + 28 - 10 = 10 - 10 + x

6x + 18 = x

4) subtract 6x on both sides as we want all x on one side.

6x - 6x + 18 = x - 6x

18 = -5x

5) divide both sides by -5.

18 = -5x

-18/5 = x

This is the same as -3.6

User Freezed
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