Question

solve by substitution method

$0.2x + 0.3y = 1.3$

$0.4x + 0.5y = 2.3$
​

Answer 1

Answer:

3

Step-by-step explanation:

0.2x + 0.3y = 1.3 --(i)×0.4

0.4x + 0.5y = 2.3--(ii) ×0.2

=> 0.08x + 0.12y = 0.52

0.08x + 0.1y = 0.46

(-) (-)

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0.02y = 0.06

y = 0.06/0.02

y = 3 (answer)