Understanding linear equations in one variable

Select why this equation is true or false without adding. 27 - 18 = 24 - 15

a. True, because both 27, 18, 24 and 15 are multiples of 3.

b. True, because if we compare 27 to 18 and 24 and 15, they are exactly the same distance apart on the number line.

c. False, because 27-18 does not equal 15.

d. False, because if 3 is subtracted from 27 to get 24, 24 and 18 would not equal 24 and 15.

• a. True, because both 27, 18, 24 and 15 are multiples of 3.

• b. True, because if we compare 27 to 18 and 24 and 15, they are exactly the same distance apart on the number line.

• c. False, because 27-18 does not equal 15.

• d. False, because if 3 is subtracted from 27 to get 24, 24 and 18 would not equal 24 and 15.

Answer explanation

27-18=9

24-15=9

Is the following equation true or false when x = 6?

3x = 18

• True

• False

2x = x + 10, so x = 10

• True

• False

Solve y+10 when y=7

• 17

• 27

7 + 9 = _ + 10

• yes

• no

Will 5 make this a true equation?

10x - 40 = 90

• YES

• NO

What value of m makes the equation true?

9.2 - m = 3.2

• 6

• 15.2

• .34

• 5

What is the missing number?

8 + ____ = 2 + 8

• 5

• 10

• 8

• 2

Determine whether the given value is a solution.
25g = 25,000 if g=1,000

• yes
• no