Question

36. What are the values of x and y for the following pair of linear equations? 3x + 2y - 7 = 0 4x + y - 6 = 0 (a) 1 and 2 (b) 2 and 2 (c) 1 and 1 (d)-1 and -1​

Answer 1

Step-by-step explanation:

3x+2y=7

4x+y=6⇒y=6−4x

placing in equation (1)

3x+2(6−4x)=7

3x+12−8x=7⇒−5x+12=7

−5x=7−12⇒−5x=−5

x=1

∴ y = 6 - 4×1=2

∴ x = 1, y = 2