Question

If y = x/2 and 3x +4y =20, then x = ?

Answer 1

Answer:

Step-by-step explanation:

X=2y

3(2y)+4y=20

6y+4y=20

10y=20

Y=20/10

Y=2

Sub y=2 in 3x+4y=20

3x+4(2)=20

3x=20-8

3x= 12

X=12/3

X=4

Answer 2

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ANSWER :

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GIVEN :

3x + 4y = 20 ____(1)

y = x/2

TO FIND :

The value of x.

SOLUTION:

Substitute the value of y = x/2 in (1),,,

(1) => 3x - 4 ( x/2) = 20

3x - 2x = 20

x = 20

The value of x is 20.

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