Question

1. Decide whether the values given against each other are the solutions of that equation or not :
(1) 7x = 20 - x, x = - 5 devided by 2, 5 devided by 2, 3 devided by 2​

Answer 1

Answer:

value of x is not equal to -5

Answer 2

Answer:

$7x = 20 - x \\ 7x + x = 20 \\ 8x = 20 \\ x = \frac{ \cancel{ 20} _{ \: \: 5}}{ \cancel 8 _{ \: \: 2}} \\ \boxed{ x = \underline{ \underline{ \large \frac{5}{2} }}}$