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