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Andru [333]
3 years ago
13

Solve the system of equations algebraically: 2x - y = -1 3x + y = 6

Mathematics
1 answer:
Sindrei [870]3 years ago
7 0
Using substitution method
from the first equ
2x+y=-1
y= -1-2x --------(3)
put equ 3 into equ 2
3x -1-2x=6
3x-2x=6+1
x =7
put x+7 into equ 1
2(7) + y = -1
14 + Y =-1
y= -1-14
y=-15
so
x=7 and y=-15<span />
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