Question

solve 3x-2y=13 and 2x+y=4​

Answer 1

Answer:

3x - 2y =13

3x = 13 +2x

$x = \frac{13 + 2y}{3} \\ putting \: the \: value \: of \: x \: in \: second \: equation \:$

we get

$2( \frac{13 + 2y}{3} ) + y = 4$

$\frac{26 + 4y}{3} + y = 4 \\ \frac{26 + 4y}{3} + \frac{y}{1} = 4 \\ \frac{26 + 4y + 3y}{3} = 4 \\\frac{26 + 7y}{3} = 4 \\ 26 + 7y = 12 \\ 7y = 12 - 26 = - 14 \\ y = \frac{ - 14}{7} = - 2$

putting the value of y in 1 eqn,

we get

x = 13 + 2 (-2)/ 3

x = 13-4/ 3

x = 9/3 = 3

Step-by-step explanation:

so , x = -3 , y= -2

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