Question

Solve: x=- 2y – 3
4y - x=9

Answer 1

(-5,1)

Explanation:

Rewrite equations:

x=−2y−3;−x+4y=9

Step: Solve x=−2y−3for x:

x=−2y−3

Step: Substitute−2y−3 for x in x+4y=9:

−x+4y=9

−(−2y−3)+4y=9

6y+3=9(Simplify both sides of the equation)

6y+3+−3=9+−3(Add -3 to both sides)

6y=6 (Divide both sides by 6)

y=1

Step: Substitute 1 for y in x=−2y−3:

x=−2y−3

x=(−2)(1)−3

x=−5(Simplify both sides of the equation)