Question

Solve the following equation and check the solution. (a) -3(x+4)=18​

Answer 1

Simplifying

3(x + -4) = 18

Reorder the terms:

3(-4 + x) = 18

(-4 * 3 + x * 3) = 18

(-12 + 3x) = 18

Solving

-12 + 3x = 18

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '12' to each side of the equation.

-12 + 12 + 3x = 18 + 12

Combine like terms: -12 + 12 = 0

0 + 3x = 18 + 12

3x = 18 + 12

Combine like terms: 18 + 12 = 30

3x = 30

Divide each side by '3'.

x = 10

Simplifying

x = 10