What is x plus x plus 40 equals 100?

Answer 1

It's a simple linear equation in 'x'. Its solution is the number that 'x' must be

in order to make it a true statement. Here's how to find the solution:

x + x + 40 = 100

Subtract 40 from each side of the equation:

x + x = 60

Combine the similar terms on the left side:

2x = 60

Divide each side by 2:

x = 30