Answer:
X= 9
Y = -6
Step-by-step explanation:
first of all setting up the equation and solve it like a system of linear equations
5x+4y=21
-3x+2y=-39
then multiply -2 on the entire second equation
5x+4y = 21
6x-4y= 78
then eliminate the 4ys and you get
11x = 99
x = 9
lastly subsititue the 9 back into one of the original equations
5(9) + 4y =21
45 + 4y = 21
4y = -24
y = -6
Answer:
-3x+2y=-39
2y=-39+3x
y=-39+3x÷2 equation 1
5x+4y=21 equation 2
5x+4(-39+3x)÷2=21
5x+2(-39+3x)=21
5x+(-78)+6x=21
5x-78+6x=21
5x+6x-78=21
11x-78=21
11x=21+78
11x=99
x=99÷11
x=9
putting value of equation 2 in equation 1
y=-39+3x÷2
y=-39+3×9÷2
y=-39+27÷2
y=-12÷2
y=-6
x=9 and y=-6 answer
hope this may help you !!!!
