5 ( 16 + x ) = 4 \quad ( 16 + x + 5
Solve for x
x=4
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80+5x=4\left(16+x+5\right)
Use the distributive property to multiply 5 by 16+x.
80+5x=4\left(21+x\right)
Add 16 and 5 to get 21.
80+5x=84+4x
Use the distributive property to multiply 4 by 21+x.
80+5x-4x=84
Subtract 4x from both sides.
80+x=84
Combine 5x and -4x to get x.
x=84-80
Subtract 80 from both sides.
x=4
Subtract 80 from 84 to get 4.
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