Question

4

Answer 1

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Answer 2

3x+4y=−10;5x−2y=18
Step: Solve3x+4y=−10for x:
3x+4y+−4y=−10+−4y(Add -4y to both sides)
3x=−4y−10
3x3=−4y−103(Divide both sides by 3)
x=−43y+−103
Step: Substitute−43y+−103forxin5x−2y=18:
5x−2y=18
5(−43y+−103)−2y=18
−263y+−503=18(Simplify both sides of the equation)
−263y+−503+503=18+503(Add 50/3 to both sides)
−263y=1043
−263y−263=1043−263(Divide both sides by (-26)/3)
y=−4
Step: Substitute−4foryinx=−43y+−103:
x=−43y+−103
x=−43(−4)+−103
x=2(Simplify both sides of the equation)
Answer:
x=2 and y=−4

Answer 3

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