Solving for the Variable

Solve for r:

r - 18 = 27

• -45

• 45

• -9

• 9

Answer explanation

Add both sides by 18 to isolate r

Solve for m:

m - (-3) = 11

• -13

• 14

• 8

• -8

Answer explanation

-1 multiply -3 is positive 3. -1(-3)=3

Subtract both sides by 3 to isolate m

Solve for x:

8x - 10 = -34

• 4

• 3

• -3

• -24

Answer explanation

Add both sides by 10 so that only 8x is left on one side.

Divide both sides by 8 to isolate x

Solve for p:

3p - 1 = 5

• 3

• 2

• 1

• 0

Answer explanation

Add both sides by 1 so that only 3x is left on one side.

Divide both sides by 3 to isolate p

Solve for d:

-7(6 + d) = 49

• 13

• 1

• -1

• -13

Answer explanation

Method 1:

Divide both sides by -7 so that only 6 + d is left on one side.

Subtract both sides by 6 to isolate d.

Method 2:

Distribute -7 to 6 and d.

Add both sides by 42.

Divide both sides by -7 to isolate d.

What is the first step in solving this equation:

5x + 7 = 12

• Divide by 5

• Subtract 5

• Multiply by 7

• Subtract 7

Solve for x:

-4x + 1 = 21

• x = 120

• x = 5

• x = 30

• x = -5

Answer explanation

Subtract both sides by 1

Divide both sides by -4 to isolate x

Solve 3x - 7 = 32

• 13

• 3

• 12

• 7

Answer explanation

Add both sides by 7

Divide both sides by 3 to isolate x

Solve for x:

7x - 11 = 5x + 25

• 18

• 17

• 16

• 15

Answer explanation

Method 1:

Subtract both sides by 5x

Add both sides by 11

Divide both sides by 2 to isolate x

Method 2:

Subtract both sides by 7x

Subtract both sides by 25

Divide both sides by -2 to isolate x

Solve for x:

-x - 29 = 15 - 3x

• 15

• 18

• 20

• 22

Answer explanation

Method 1:

Add both sides by 3x

Add both sides by 29

Divide both sides by 2 to isolate x

Method 2:

Add both sides by x

Subtract both sides by 15

Divide both sides by -2 to isolate x