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2x+8=5\left(x+4\right)
Use the distributive property to multiply 2 by x+4.
2x+8=5x+20
Use the distributive property to multiply 5 by x+4.
2x+8-5x=20
Subtract 5x from both sides.
-3x+8=20
Combine 2x and -5x to get -3x.
-3x=20-8
Subtract 8 from both sides.
-3x=12
Subtract 8 from 20 to get 12.
x=\frac{12}{-3}
Divide both sides by -3.
x=-4
Divide 12 by -3 to get -4.