Answer:
x=5
Step-by-step explanation:
7(2x-4) = 42
14x -28 =42
14x = 42+28
14x =70
x=70/14
x=5
7(2x-4) = 42
Mutiply the bracket by 7
(7)(2x)(7)(-4)= 42
14x-28= 42
Move -28 to the other side
Sign changes from -28 to 28 to get 14x by itself
14x-28+28= 42+28
14x=70
divide by 14 for both sides
14x/14= 70/14
Cross out 14 and 14, divide by 14 and then becomes x
x= 5
Answer: x= 5
