3x=4y
x+y=21
x = 21-y
3(21-y)=4y
63-3y=4y
63=7y
y=9
x+y=21
x+9=21
x=12
answer is (12, 9)
Being able to write fractions in simplest form can make operations much easier. Also, to compare fractions, some may have to be in the simplest form.
Substitute
12(3) + (52)
12(3) = 36
36 + 52 = 88
7) answer-6t
t=toms cans collected
8) answer- 5.5
8.3-2.8=5.5
9) answer-14
56/4=14
