Hi I would like to know the exact way to simplify an algebraic expression emphasizing on when and why I change a portion of it from a positive to a negative or vice versa?
5x + 4 - 3 + 2 x 7
3 (3x + 5) - (7 +6 - 2x)
BODMAS will be used
Brackets, Of, Division, Multiplication, Addition, Substraction
Ok thank you. The most important part of my question that I need help with though us understanding when and why you changed - (7+6 - 2x) into - 7 - 6 - 2x. How did you know to change the + into a - between 7 and 6 but NOT to change - 2x into + 2x?
sorry, it was supposed to change to +correction for that
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