Hello there!
5(7+x)-4=7-8(1-4)
Distribute (multiply 5 by everything inside the parentheses:
35+5x-4=7-8(1-4)
Combine like terms:
5x+35-4=7-8(1-4)
5x+31=7-8(1-4)
5x+31=7-8(-3)
5x+31=7+24
5x+31=31
Move all the numbers to the right side:
5x=31-31
5x=0
Divide both sides by 5 to isolate x:
x=0
Hope this helps you!
~Just a joyful teen