Question

3x+4y=20 and x-2y=0
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Answer 1

Answer:

x-4.y=2

Step-by-step explanation:

x-2y=0

=2x-4y=0

ELIMINATION METHOD

3x+4y=20

2x-4y=0(Subtract)

=3x+(2x) = 20

5x=20

x=4

sub x=4

(4)-2y=0

-2y=(-4)

y=(-4/-2)

y=2

Answer 2

Step-by-step explanation:

3x+4y=20. (I)

x-2y=0. (ii)

x=2y

3x+4y=20

3×2y+4y=20

6y+4y=20

10y=20

y=20/10=2

put the value of y in eq(ii)

x-2y=0

x-2×2=0

x-4=0

x=4

since x=4. and

y=2

this is the answer of your questions