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Anastaziya [24]
3 years ago
11

Y=2x+7 3x-y=-9 Solve each system of equation by the substitution method.

Mathematics
2 answers:
ANTONII [103]3 years ago
7 0
1. = 2x = 7
2. = 9 + 3x
givi [52]3 years ago
4 0
Plug in the first equation into the he second equation

3x-(2x+7)=-9
3x-2x-7=-9
x-7=-9
x=-2

plug in x=-2 into the first equation

y=2(-2)+7
y=-4+7
y=3

answer: (-2,3)
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Answer:

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Step-by-step explanation:

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∵ Charlie knows that 3 blocks are needed to make a tower that is

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