1.

Solve the following pair of linearequations by elimintion method3x+2y-2=0; 2x+ 5y +6=0​

Answer»

Step-by-step explanation:

\sf 3x + 2y - 2 = 0

\sf 2x + 5y + <klux>6</klux> = 0

\text{Writing the <klux>EQUATIONS</klux> in their standard form,}

3x + 2y - 2 = 0

3x + 2y = 2

2x + 5y + 6 = 0

2x + 5y = - 6

\sf 3x + 2y = 2

\sf 2x + 5y = -6

Let's eliminate x .

Multiplying the first eq. by 2 and 2nd eq. by 3 to make the coefficients of x same in both eq.

\sf 2(3x+2y=2)

\sf 3(2x + 5y = -6)

(Subtracting the equations will CHANGE the signs in each term)

\sf \: 6x + 4y = 4

(-) \sf \underline{6x (-)+ 15y = (-)-18}

-11y = 22

\boxed{\sf y = -2}

\sf 3x + 2y=2

\sf 3x + 2(-2) = 2

\sf \implies 3x-4=2

\sf \implies 3x = 4+2

\sf \implies 3x = 6

\boxed{ \sf x=2}

Hope it helps.



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