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Mathematics
Chelsea Vaughan
7 January, 21:28
X-3y=17
-6x+5y=-11
Solving systems by substitution
+4
Answers (
1
)
Marin Boyd
7 January, 23:12
0
Answer: x=-4, y=-7
Step-by-step explanation:
x-3y=17 Add 3y to both sides to isolate x.
x=3y+17 Now you can substitute this into the other equation.
-6 (3y+17) + 5y=-11
-18y-102+5y=-11
-13y-102=-11
-13y=91
y=-7 Substitute this back into any equation to find x.
x-3 (-7) = 17
x+21=17
x=-4
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