Answer:
By distributing the -5 to the 4x and -7.
Step-by-step explanation:
-5( 4x - 7 ) + 8 = 3x
-20x + 35 + 8 = 3x
The first step is to distribute the -5
-5(4x-7)+8=3x
-5*4x -5*-7 +8 = 3x
40
Let the number be y
-1/2 × y = -20
y = -20 ÷ -1/2
y = 20 × 2
y = 40
