Answer:
x=5
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
7(x+3)=4(x+9)
(7)(x)+(7)(3)=(4)(x)+(4)(9)(Distribute)
7x+21=4x+36
Step 2: Subtract 4x from both sides.
7x+21−4x=4x+36−4x
3x+21=36
Step 3: Subtract 21 from both sides.
3x+21−21=36−21
3x=15
Step 4: Divide both sides by 3.
3x
3
=
15
3
x=5
