Question

solve the equations 0.4x-1.5y=6.5 and 0.3x+0.2y=0.9 by substitution method ​

Answer 1

Answer:

x=5

y=-3

Step-by-step explanation:

0.4x-1.5y=6.5...............(1)

0.3x+0.2y=0.9............(2)

From (1)

x=(6.5+1.5y)/0.4.....(3)

Substitue x in (2)

0.3(6.5+1.5y)/0.4+0.2y=0.9

19.5+4.5y+0.8y=3.6

5.3y=-15.9

y=-15.9/5.3

y=-3

Substitute y in (3)

So x=5

Answer 2

Answer:

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