Question

solve the following equations 3x - y = 7 ; x + 4y = 11

Answer 1

3x-y=7
3x=7+y
x=3(7+y)
x=21+3y



x+4y=11
4y=11-x
y=4(11-x)
6=44-4x
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Answer 2

Given,

The following equations:

3x - y = 7; x + 4y = 11

To Find,

Solve the following equations

Solution,

We can solve the question as follows:

The two given equations are-

$3x - y = 7\\x + 4y = 11$

From the first equation, we will find the value of y.

$3x - y = 7\\3x - 7 = y$

Now, substituting the value of y in the second equation,

$x + 4y = 11$

$x + 4(3x - 7) = 11$

$x + 12x - 28 = 11$

$13x = 39$

$x = 3$

Now, substituting x = 3 in the first equation,

$3x - y = 7$

$3*3 - y = 7$

$9 - y = 7$

$y = 2$

Hence, the value of x is 3 and the value of y is 2.