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mariap3504
21.04.2020 •
Mathematics
Solve the system of equations 7x - y = -13 and -3x - y = -3 by combining the equations
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Ответ:
The answer to your question is (-1, 6)
Step-by-step explanation:
Data
7x - y = -13 Equation l
-3x - y = -3 Equation ll
-Solve equation l for y
y = 7x + 13 Equation lll
-Substitute equation lll in equation ll
-3x - (7x + 13) = -3
-Solve for x
-3x - 7x - 13 = -3
-10x = 13 - 3
-10x = 10
x = 10/-10
x = -1
-Substitute x in equation lll
y = 7(-1) + 13
y = -7 + 13
y = 6
Ответ:
it would be the first answer I think. not very sure