richardudoh68 richardudoh68

20-02-2021
Mathematics

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2x+y=-5;3x+2y=-8 in substitution method

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thebecks thebecks

20-02-2021

Answer:

x = -2

y = -1

Step-by-step explanation:

2x+y = -5 so y = -5-2x

3x+2y = -8

substitute for y

3x+2(-5-2x) = -8

3x-10-4x = -8

-10-x = -8

add 10 to both sides

-10+10-x = -8+10

-x = 2

divide both sides by -1

-x/-1 = 2/-1

x = -2

y = -5-2(-2)

y = -5+4

y = -1

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