If a number decreased by 36 and the result is 76 less than twice the number what is the number?

Geometry answer picture question pls . reason and statements

Given the statements, "a square root of 16 is 4," and "a square root of 9 is -3," complete the following blanks with the correct truth-values. p is and q is , so the statement, "a square root of 16 is 4 or a square root of 9 is -3" is .

How is working backward similar to solving an equation?