Question

Elimination 18x+27y=7.5 4x+6y=20

Answer 1

so this equation has no solution.

Explanation:

18 x + 27 y = 7.5 .......equ No 1

4 x + 6 y = 20........equ No 2

4 x = 20 - 6 y

x =
`(20 -6 y)/(4)`

substitute the value of x in equ No 1108 y

18 {
`(20 - 6 y)/(4)` } + 27 y = 7.5

18( 20 - 6y) + 27 y × 4 = 7.5 × 4

18 × 20 - 18 × 6 y +27 × 4 y =30

360 - 108 y + 108 y = 30

360 - 0 y = 30

330= 0 y

y = 330 ÷ 0 cannot be defined

so we cannot find x also .

so this equation has no solution.