20 - 4x = 2(4 - 8x)
Make sure to do the parentheses first or factor out first
20 - 4x = 8 - 16x
add 16x to both sides
20 + 12x = 8
Subtract 20
12x = -12
Divide by 8
x = -1
Answer:
x=-4
Step-by-step explanation:
20-4x=4-8x
move variable to the left side and change its sign:
20-4x+8x=4
-4x+8x=4-20
4x=4-20
4x=-16-Divide both sides of the equation by 4
x=-4
