An Equation is a mathematical sentence that uses the equal sign (=) to show that two expressions are equal.
The following are some examples of equation.
10 + 2 = 12
4a - 3b = 1
ex + y = - 2
A. 1
B. 9/7
C. - 1
D. 8/7
Correct Answer: C
Step 1: 7x + 8 = 1
Step 2: Subtracting 8 from each side, we get, 7x = - 7.
Step 3: Dividing both sides by - 7, we get, x = - 1.