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This can be done in an equation only. Multiply the entire equation by the LCD. This cancels every denominator leaving an equation with no fractions. EX: x/3 + 2/5 = 3/4 so the LCD for 3,5, and 4 is 60 60(x/3) + 60(2/5) = 60(3/4) 20(x) + 12(2) = 15(3) no more fractions, just solve.
3 x - 7 = -21
the equation is 2x + 4 = x - 3 solving it yields x = -7
The greatness of 4 squared and 3 squared is expressed by the equation: 16 - 9 which equals 7.3 squared equals 3 x 3 = 94 squared equals 4 x 4 = 1616 - 9 = 7
When we move numbers from one side of an equation to another we are actually performing an action to each side of the equation. For example X + 3 = 7 to get the 3 to the other side we must subtract it from the left side of the equation. What we do to one side we must also do to the other X + 3 - 3 = 7 - 3 Most people skip writing the above step and go straight to the next notation X = 7 - 3 the answer of course is X = 4