Question

solve by elimination method :----
a) 8x-5y=7
2x+3y=4
b) 7x-9y=3
5x+2y=-1
c) 2x-3y=-4
4x+11y=3

Answer 1

I will give u 1 example
8x-5y=7*2
2x+3y=4*8
16x-10y=14
16x+24y=32
__________
-14y =-18
____________
y=7/9
substitute y in equation
2x+3(7/9)=4
2x+7/3=4
2x=7/3-4
2x=7-12/3
2x=-5/3
x=-5/6
if it helps
plz mark me as a brainlist

Answer 2

Answer:$8x+2y=5 =====(i)\\2x+5y=7=====(ii)\\\\4(ii)=4(2x+5y)=28\\\\8x+20y=28 =====(iii)\\\\(iii)-(i)=8x+20y-8x-2y=28-5\\\\18y=23\\\\y=\frac{23}{18}$

Step-by-step explanation: