Equations with Variables Both Sides

What is the first step to solve this equation:
11 - 3x = 44

• Add 3 to both sides

• Subtract 11 from both sides

• Add 11 to both sides

• Divide 3 on both sides.

Tags

CCSS.7.EE.B.4A

Mike is driving a boat at 12 mph and is increasing his speed by 0.2 mph each second. Hank is driving a boat at 25 mph and is decreasing his speed by 0.7 mph each second. Which of the following equations could be used to determine x, the number of seconds it will take for the boats to be traveling the same speed?

• 12x + 0.2 = 25x - 0.7

• 12 - 0.2x = 25 + 0.7x

• 12.2x = -25.7x

• 12 + 0.2x = 25 - 0.7x

• t = 6

• t = -16

• t = -5

• t = 4

10x + 9 = 4x - 9

• 0

• 3

• -3

• -18

Solve: 5x + 15 = 10x - 40

• x = 10

• x = -10

• x = 11

• x = -11

What is the value of x in the equation below

3x - 5 = -2x ?

2x = x + 3

• 6

• 3

• 2

• x

30 + 6t = 11t

• 3

• 5

• 6

• 30

8x - 8 = -4x + 16

• 8

• 16

• 24

• 2

Solve for x:
5x - 14 = 8x + 4

• x = 6

• x = -6

• x = -18/13

• x = 10/3