lizbethmillanvazquez
03.12.2020 •
Mathematics
Can you tell me how to solve this problem using substitution step by step? y = -2x - 9 and 6x - 5y = - 19
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Ответ:
x = -4
Step-by-step explanation:
The first equation tells us what y is equal to. We then substitute wherever there is a y with what y equals.
y = -2x - 9
6x - 5y = -19
6x - 5(-2x-9) = -19
6x + 10x + 45 = -19
16x + 45 = -19
16x = -64
x = -4
Ответ:
46
Step-by-step explanation:
add it and multiply it I'D SHOWED MY WORK