12(x + 9)= -108 : solve algebraically

Final

x = -18

Solution:

equation: 12(x + 9) = -108

Step 1: divide both sides by 12.

12(x + 9)     -108

=  

   12             12

           -108

x + 9 =   (solve -108/12)

              12

Step 2: subtract 9 in both sides.

x + 9 = -9

x + 9 - 9 = -9 - 9

Last  step: solve for x.

x = -9 - 9

x = -18

;)

step-by-step explanation:

the true ones are a b and d

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true