Equations in Two Variables Both Sides

3x = 15 - 2x

• x = 9

• x = 3

• x = -3

• x = 6

-2y + 8 = 4y - 10

• y = 3

• y = -3

• y = 6

• y = -6

-10x - 135 = 117 + 2x

• 25

• -18

• -21

• 22

7x - 11 = 5x + 25

• 18

• 17

• 16

• 15

-99 - 2x = 48 + 5x

• -21

• 22

• -22

• 21

-x - 163 = 12x + 84

• 17

• 18

• 19

• 20

-38 + 6x = 52 + 3x

• 20

• 30

• 40

• 10

Jacob solved the following equation using the steps shown.

Step 1 5x + 9 = 2x - 3

Step 2 3x + 9 = -3

Step 3 3x = -12

Step 4 x = -4

What operation did he perform to get from Step 1 to Step 2?

• Subtracted 2x from both sides of the equation

• Subtracted 9 from both sides of the equation

• Multiplied both sides of the equation by 3

• Added -3 to both sides of the equation

Solve:
7x = 3x + 24

• 6

• 10

• 14

• 4

Solve for x:
4(1-x) + 3x = -2(x+1)

• x = -6

• x = 6

• x = 3