4(x+7)=8x-20
4x+28=8x-20
28=4x-20
48=4x
x=12
1/4 is the correct answer
So basically 42=x times 64 or 42=64x where you want x to be represented as a fraction so just don't simplify as much
42=64x
divide both sdies by 64
42/64=64/64x
42/64=1x
x=42/64
simplify
42/64=21/32
the answer is 21/32 in simplest form
Her brother is 8: 8 x 2 is 16, and 16 + 8= 24.
