Question

2. Solve the following equations by the trial and error method. a) 2x + 10 = 18 b) 3(x-1) = 6 c) 5a -12 = 23 d) 5x = -75
Book answer is Q no ( a ) answer is x = 4 ,
Q no ( b ) answer is x = 3 , ( c ) answer is a = 7 , Q no ( d ) answer is x = - 15 ​

Answer 1

Step-by-step explanation:

$2x + 10 = 18 \\ 2x = 18 - 10 \\ 2x = 8 \\ x = \frac{8}{2 } \\ x = 4$