Question

Directions: Select ALL the correct answers.Select all equations that have the solution x = 7.6(2x - 1) - 12 = -2(x + 10)2(x + 7) = 2860 = 4(x + 8)3(x - 5) = 1 + 5(x-6)

Answer 1

In order to determine which equations have the solution x = 7, replace this value of x into the equations and determine if the equation is correct, just as follow:

6(2x - 1) - 12 = -2(x + 10)

6(2(7) - 1) - 12 = -2(7 +10)

6(13) - 12 = -2(17)

66 = -34

the previous result is wrong, then x = 7 is not a solution

2(x + 7) = 28

2(7 + 7) = 28

2(14) = 28

28 = 28

the previous result is right, then x= 7 is a solution

60 = 4(x + 8)

60 = 4(7 + 8)

60 = 4(15)

60 = 60

the previous result is right, then x= 7 is a solution

3(x - 5) = 1 + 5(x-6)

3(7 - 5) = 1 + 5(x-6)

3(2) = 1 + 5(7-6)

6 = 1 + 5(1)

6 = 6

the previous result is right, then x= 7 is a solution