Question

2x-5y=11 : 3x+y=8 solve by substitution​

Answer 1

Answer:

Values x = 3 , y = -1

Step-by-step explanation:

Let ,

Eq (1) ----- 2x - 5y = 11

Eq (2) ----- 3x + y = 8

Multiply Eq (2) by 5

=>> 5(3x + y = 8)

=>> 15x +5y = 40 -----Eq (3)

Add Eq (1) & Eq (3)

=>> 2x - 5y = 11

=>> 15x + 5y = 40

___________________

=>> 17x = 51

=>> x = 51 /17

=>> x = 3

Put value x = 3 in Eq (2) = 3(3) + y = 8

=>> 9 + y = 8

=>> y = 8 - 9 = -1

=>> y = -1