Answer:
x=3 and y=−4
Explanation:
Solve4x+y=8for y:
4x+y=8
4x+y+−4x=8+−4x(Add -4x to both sides)
y=−4x+8
Step: Substitute−4x+8 for y in 5x+2y=7:
5x+2y=7
5x+2(−4x+8)=7
−3x+16=7(Simplify both sides of the equation)
−3x+16+−16=7+−16(Add -16 to both sides)
−3x=−9
-3x/-3=-9/-3
(Divide both sides by -3)
Step 2: Substitute 3 for x in y=−4x+8:
y=−4x+8
y=(−4)(3)+8
y=−4(Simplify both sides of the equation)