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15x+30=6\left(2x+7\right)
Use the distributive property to multiply 15 by x+2.
15x+30=12x+42
Use the distributive property to multiply 6 by 2x+7.
15x+30-12x=42
Subtract 12x from both sides.
3x+30=42
Combine 15x and -12x to get 3x.
3x=42-30
Subtract 30 from both sides.
3x=12
Subtract 30 from 42 to get 12.
x=\frac{12}{3}
Divide both sides by 3.
x=4
Divide 12 by 3 to get 4.