How do you solve by substitution: 3x-8y=-7 and -5x-6y=3?
2 Answers
Explanation:
-5(x) - 6y = 3
-5((-7 + 8y)/3) - 6y = 3
(35)/3 + (40y)/3 - 6y = 3
35 + 40y -2y = 1
38y = -34
y = -34/38
x = (-7 + 8(-34/38))/3
x = -269/57
I will let you finish off
Explanation:
Given:
Consider
Add
Divide both sides by 3
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Using
Put everything over 3 to make calculation more straight forward.
Multiply both sides by 3
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I will let you finish off