Question

solve eqation by substitution cross multiplication elimination method x-7y+30=0 x-3y-10=0

Answer 1

Answer:

[refer the attachments ]

Answer 2

The value of x is 40 and y is 10.

Step-by-step explanation:

The given system of equation is

$x-7y+30=0$           .... (1)

$x-3y-10=0$           ... (2)

From equation (1) we get

$x=7y-30$         .... (3)

Substitute x=7y-30 in equation (2).

$7y-30-3y-10=0$

$4y-40=0$

$4y=40$

$y=10$

Substitute y=10 in equation (3).

$x=7(10)-30$

$x=70-30$

$x=40$

Therefore, the value of x is 40 and y is 10.

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