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08.07.2019 •
Mathematics
For the following system, if you isolated x in the second equation to use the substitution method, what expression would you substitute into the first equation?
3x + y = 8
−x − 2y = −10
a.) −2y + 10
b.) 2y + 10
c.) 2y − 10
d.) −2y − 10
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Ответ:
A.) −2y + 10
Step-by-step explanation:
−x − 2y = −10
Add 2y to both sides.
-x = 2y - 10
Multiply both sides by -1.
x = -2y + 10
Ответ:
I think It men't 42x52x7 Which is 15288
Step-by-step explanation: