Question

(iv) 0.2x +0.3y=1.3
0.4x +0.5y = 2.3​

Answer 1

Answer:

0.2x=1.3-0.3

0.2x=1

now in equation 2

2(1)+ 0.5y=2.3

2+0.5y=2.3

0.5y=0.3

y= 1.66666(nearly)

now substitute value of y in any equation

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Answer 2

Answer:

x=2. y=3

Step-by-step explanation:

[0.2x+ 0.3y= 1.3 ] × 2

minus

0.4x+ 0.5y= 2.3

will give

0.6y- 0.5y= 2.6-2.3

0.1y= 0.3

y=3

putting y=3 in equation 2

0.4x+ 1.5= 2.3

0.4x= 0.8

x= 2