Please can someone help with this question? I will mark brainliest!

1

Step-by-step explanation:

ok, so just first, plug a and b into the equation to get:

.

Then do the squares in the denominator to get

then we change the fractions in the denominator to get a common denominator, to get: then we add the fractions to get: . 1409/100 = 14.09, and we simplify the number to .

10/14.09 ≈ 1, so that's your answer

Hope this helps! :D

42

step-by-step explanation:

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x