Question

General form of 0.3+0.5y=2​

Answer 1

sapna678625

14.07.2018

Math

Secondary School

+5 pts

Answered

0.2 X + 0.3 Y = 1.3 0.4X + 0.5Y = 2.3 by substitute method

2

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0.2x+0.3y=1.3

(0.2x+0.3y)×10=1.3×10

2x+3y=13 ---[1]

0.4x+0.5y=2.3

(0.4x+0.5y)5=2.3×5

2x+2.5y=11.5 ---[2]

Eq. [1]-[2]

2x+3y-2x-2.5y=13-11.5

0.5y=1.5

5y=15

y=3

x=(13-3y)/2=(13-3×3)/2=2

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Answer 2

Answer:

y = 3.4

Step-by-step explanation:

0.3 + 0.5y = 2

or, 0.5y = 1.7

or, y = 1.7/0.5 = 17/5 = 3.4

Let's substitute :

0.3 + 0.5*3.4 = 0.3 + 1.7 = 2 Thus proved.

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