how to change the following indicated sums to indicated products as in the preceding model: 5 • 20 + 5 • 3
1 answer:
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Answer:
Rewrite equations:
−3x=16y+33;−3x+11y=18
Step: Solve−3x=16y+33for x:
−3x=16y+33
−3x
−3
=
16y+33
−3
(Divide both sides by -3)
x=
−16
3
y−11
Step: Substitute
−16
3
y−11forxin−3x+11y=18:
−3x+11y=18
−3(
−16
3
y−11)+11y=18
27y+33=18(Simplify both sides of the equation)
27y+33+−33=18+−33(Add -33 to both sides)
27y=−15
27y
27
=
−15
27
(Divide both sides by 27)
y=
−5
9
Step: Substitute
−5
9
foryinx=
−16
3
y−11:
x=
−16
3
y−11
x=
−16
3
(
−5
9
)−11
x=
−217
27
(Simplify both sides of the equation)
Answer:
x=
−217
27
and y=
−5
9
Step-by-step explanation:
