c+2c+12=75what is the value of c?
Simplify c+2c+12 to 3c+123c+12=75Subtract 12 from both sides3c=75−12Simplify 75−12 to 633c=63Divide both sides by 3c=63/3Simplify 63/3 to 21c=21
c+2c+12=753c + 12 = 753c = 75 - 123c = 63с = 63 : 3с = 21______________________3 × 21 + 12 = 75 63 + 12 = 75 75 = 75
