Question

20x + 10 A) 9 C) 8 21x +4 B) 5 D) 6​

Answer 1

x = 6

Explanation:

Given 20x + 10 = 21x + 4 we can rearrange to combine like terms and isolate x to solve.

Subtract 20x from both sides (this moves the x terms to the same side).

20x [-20x] + 10 = 21x [-20x] + 4

We get:

10 = 1x+ 4

Then subtract 4 from each side

10 [-4] = 1x+ 4 [-4]

Which leaves us with: *the 1 in front of the x is understood

6 = x

Thus: x = 6