Question

7x+6y=3800
3x+5y=1750
solve by elimination and cross multiplication ​

Answer 1

7x+6y=3800-----(i)*3

3x+5y=1750---(ii)*7

21x+18y=11400----(iii)

21x+35y=12250---(iv)

on subtracting equation iii from iv we get

17y=850

y=50

Therefore,

put the value of y=50 in equation i we get

7x+6*50=3800

7x+300=3800

7x=3500

X=500

Answer 2

1st pic is the solution with elimination method.

2. is with cross multiplication...

Hop it helps