Question

please help me in this question​

Answer 1

0.4x+0.3y=1.7. .....1)

0.7x-0.2y =0.8. .....2)

multiply eq. 1)by 0.2 and eq. 2) by

0.3,

0.08x +0.06y=0.34. ....3)

0.21x - 0.06y=0.24. .....4)

add eq. 3) & eq. 4),

0.29x. =0.58

x= 2

put in eq. 1),

y = 54