Question

2x+y=9 , -4x + 3y = 7 use substitution method​

Answer 1

Answer:

x=2 and y=5

Step-by-step explanation:

Given equations are:

2x+y=9 -------------›(1)

and -4x+3y=7 --------------›(2)

From equation (1) we know that;

y=9-2x --------------›(3)

Substitute the value of y in equation (2)

Then, -4x+3[9-2x]=7

-4x+27-6x=7

27-10x=7

-10x=-20

x=20/10

i.e, x=2

Put the value of x in equation (3) and we will get the value of y;

y=9-(2×2)

y=9-4

Therefore, y=5