Question

7x + 2(x+2) = 20 - (2x-5) solve and check​

Answer 1

Answer:  x = 21/11

Step-by-step explanation:

7x + 2(x + 2) = 20 - (2x-5)

=> 7x + 2x + 4 = 20 - 2x +5

=> 9x + 2x = 25 - 4

=> 11x = 21

=> x = 21/11

Verification :

LHS : 7x + 2( x + 2)

       = 7 x 21/11 + 2( 21/11 + 2)

       = 147/11 + 2 * 43/11

       = 147/11 + 86/11

       = 234/11

RHS : 20 - (2X - 5)

       = 20 - ( 2 * 21/11 - 5)

       = 20 - ( 41/11 - 5)

      = 20 - ( (41 - 55)/11)

      = 20 - (-14/11)

      = 20 + 14/11

      = (220 + 14)/11

      = 234/11

Hence LHS = RHS

Hence Proved