21. Which of this algebraic equation is variable? 5y - 9 = 13

a.y

b. 5

c.9

d. 13

22. Determine the variable in the algebraic expression: -3(m+n)

a.m and n

b.-3m

c. n

d. 13mn

Which algebraic expression has variable?

a. 4+5

b. 4n+5

c. 5+4=

d. +5

24. Write an algebraic expression in this real life situation: Mr. and Mrs. Santos own
a laundry shop. They had 134 customers this week, 18 fewer than last week. Write
an algebraic equation for the number of customers they had last week.

a. 134-18

b. C-18=134

C. 18-134

d. c134-18

25. Aling Lourdes, when asked about her age, replies, "lam six years older than twice
the age of my youngest child." Express her age in algebraic equation if her age now
is 66.

a. 2a + 6=66

b. 6 +2=66

C. 66-2a=6

d. 2a-66+6

26. The Grade 6 basketball team scored three less than thrice as many points as
their opponent. Their total score at the end of the game was 108. Write an
algebraic equation for the number of points they scored.

a. 35-3=108

b. 3-3=108

c. 3s=108-3

d. 108-3=3

27. A number increased by 5 is 12. What is the number?

b. 6

c. 7

d. 8

a. 5​