Question

x+7y=10. 3x-2y=7 solve by elemination method​

Answer 1

$\huge{\mathfrak{Hello\ Mate}}$

x + 7y = 10 ______(1)

3x - 2y = 7 _______(2)

Multiply equation (1) by 3.

→ 3x + 21y = 30 ________(3)

$\bf{Now, A.T.Q} \\ \\ \sf{3x \: + \: 21y \: = \: 30 } \\ \sf{ 3x \: - 2y \: = \: 7 \: \: \: \: \: } \\ \ \: - - - - - - - - - \\ \sf{ - \: \: \: \: \: \: \: \: \: \: \: \: \: + \: \: \: \: \: \: \: \: \: \: \: - \: \: \: \: \: \: \: \: \: } \\ \sf{23y \: \: \: \: \: = \: \: \: \: \: \: \: \: \: \:23 } \\ \sf{y \: = \: 1}$

Now, Put value of y in equation 1.

$\sf{x \: + \: 7(1) \: = \: 10} \\ \sf{x \: = \: 10 \: - \: 7} \\ \sf{x \: = \: 3}$