Solve using substitution.
y = -4x + 5
y = x + 10
2 answers:
Lets turn the last equation into something x equals.
x = y - 10.
y = -4(y - 10) + 5
y = -4y + 40 + 5
y = -4y + 45
-5y = -45
y = 9
9 = -4x + 5
0 = -4x - 4
4x = -4
x = -1
The pair is (-1, 9) (x = -1, y = 9)
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Answer:
x=-1
Step-by-step explanation:
y=-4x+5
y=x+10
------------
-4x+5=x+10
-4x-x+5=10
-5x=10-5
-5x=5
x=5/-5
x=-1
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