Question

1) Check whether the value given in the bracket is a solution to the given equation

or not.
a) x + 7=12 ( x=5)
b) 2x-3-10 (x=7).​

Answer 1

yes and no

Explanation:

Substitute the given values for x into the equationand if the value obtained is equal to the right side then it is a solution.

(a)

x + 7 = 5 + 7 = 12 ← True , thus x = 5 is a solution

(b)

2x - 3 = 2(7) - 3 = 14 - 3 = 11 ≠ 10, thus x = 7 is not a solution