Question

what is the valueo of x and y

3x+4y=18
4x+3x=17.
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Answer 1

The given equations are

3x+4y=18 ...(i)

4x+3y=17 ...(ii)

On multiplying (i) by 4 and (ii) by 3 and subtracting, we get

$12x + 16y = 72 \\ \frac{12x + 9y = 51}{7y = 21} \\ = > y = 3$

On putting y=3 in (i), we get

3x+12=18⇒3x=6⇒x=2

∴x=2,y=3

Answer 2

Refer to the attachment