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Y=-5 5x+4y=-20 it say solve by substitution
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3 votes
Y=-5
5x+4y=-20
it say solve by substitution

User Srikrushna
by
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2 Answers

4 votes
5x + (4 · -5) = -20
5x - 20 = -20
5x = 0
x = 0
User JDx
by
7.8k points
4 votes

y=-5\\5x+4y=-20 \\\\5x+4 \cdot (-5)=-20 \\\\5x-20=-20\ \ | \ add\ 20\ to\ both\ sides \\\\5x=0 \ \ | \ divide \ both \ sides\ by\ 5\\\\x=0


User Harvey Dent
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