Question

solve the following pairs of lenier equations using the elimination by substitution : 2. 2x-3y=7 , 5x+y=9​

Answer 1

Step-by-step explanation:

2x−3y=7 ----------------(1)

5x+y=9

y=9−5x-------------(2)

Now, substitute equation (2) in equation (1)

Then ,2x−3(9−5x)=7

2x−27+15x=7

17x=27+7

17x=34

x=34/17=2

y=9−5×2=9−10=−1

Therefore x is 2 and y is −1