Solve for x using
cross multiplication.
4x - 4
4x - 4
7
x + 3
x = [?]

Answer:
x = 29
Step-by-step explanation:
Multiply both sides by 7:
[tex]4x-4=\frac{7x+21}{2}[/tex]
Multiply both sides by 2:
[tex]8x-8 = 7x+21[/tex]
Subtract 7x from both sides:
[tex]x-8=21[/tex]
Add 8 to both sides
[tex]x=29[/tex]