Answer:
Explanation:
−4x+y=6 ------------ (1)
−5x−y=21 ----------- (2)
We can transpose −4x in the first equation to the right hand side:
y=4x+6 ------(3)
Substituting y from the third equation into the second one gives us:
−5x−(4x+6)=21
−5x−4x−6=21
−9x−6=21
−9x=21+6
−9x=27
x=27÷−9
x=−3
Substituting x=−3 in the third equation will give us :
y=4(−3)+6
y=−12+6
y=−6
The solution to both these equations : x=−3 ; y=−6
HOPE IT HELPS!