Question

0.4x - 1.5y = 6.5
0.3x + 0.2y = 0.9
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Answer 1

Hi there !!

0.4x - 1.5y = 6.5

0.3x + 0.2y = 0.9

Multiplying both equation by 10.Then, it will become

4x - 15y = 65------(1)

3x + 2y = 9--------(2)

We can done it by various method,I will do it by substitution method.

From equation (1)

x=65+15y/4 -----(3)

Put x in equation 2

3(65+15y/4) +2y=9

195+45y+8y=36

53y=-159

y=-3

Substitute y in equation (3)

x=65+15y/4 -----(3)

65-45/4 =20/4

x =5

Thankyou :)