Question

Using the guess and check technique, find two numbers that satisfy both conditions. The sum of the two numbers is 56. The second number is seven less than two times the first number. What is the value of the first number, x?

A.19
B.21
C.31
D.35

Answer 1

B.21

Explanation

I Guessed and Got it right

Answer 2

So let's get two variables
x and y
X+Y=56
But with our formula...
3x - 7 = 56
x = 21
The answer is option B