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forty-five is equal to twelve more than thrice a number.

Sagot :

Atpparagasidn

45 = 12 + 3x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation.

45 + -3x = 12 + 3x + -3x

Combine like terms: 3x + -3x = 0

45 + -3x = 12 + 0

45 + -3x = 12

Add '-45' to each side of the equation.

45 + -45 + -3x = 12 + -45

Combine like terms: 45 + -45 = 0

0 + -3x = 12 + -45

-3x = 12 + -45

Combine like terms: 12 + -45 = -33

-3x = -33

 

Divide each side by '-3'.

x = 11