solve for x and y : .05x+ .2y= .07, .3x- .1y= .03 plzz solve step by step plzz.
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maths97:
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by multiplying u got 0.65x
No by adding
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Step-by-step explanation:
.05x+.2y=.07
.3x-.1y=.03
Multiply (1)and (2) by 100
5x+20y = 7. _(3)
30x-10y= 3. _(4)
Multiply (3) by 1 and (4) by 2
5x+20y=7. _(5)
60x-20y=6. _(6)
Adding eq (5)and (6)
5x+20y =7
60x-20y=6
65x= 13
x= .2
putting x=.2 on eq (3).
5x+20y= 7
5×(.2) +20y= 7
1+20y =7
20y= 6
y = .3
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