(847+х)-307=694 498+(202-х)=564 (762-х)-392=215

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To solve these equations, we need to isolate the variable x by performing the necessary operations on both sides of the equation.

(847+x) - 307 = 69
Subtract 847 from both sides
x - 307 = -15
Add 307 to both sides
x = 154

498 + (202 - x) = 56
Simplify the expression within the parentheses first
498 + 202 - x = 56
Combine like terms
700 - x = 56
Subtract 700 from both sides
-x = -13
Divide by -1 to solve for x
x = 136

(762 - x) - 392 = 21
Simplify by adding or subtracting within the parenthese first
762 - x - 392 = 21
Combine like terms
370 - x = 21
Add x to both sides
370 = x + 21
Subtract 215 from both sides
x = 155

Therefore, the solutions to the equations are: