Justify each step in solving the equation 7(x+1)+11x=-2x-5 by writing a reason for each statement.

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04-10-2020
Mathematics

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Justify each step in solving the equation 7(x+1)+11x=-2x-5 by writing a reason for each statement.

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mieraanh mieraanh · Answer 1 · 2020-10-04T06:46:27+02:00

2) we multiplied 7 with x+1 to eliminate the bracket

3) we added the x’s (7x and 11x)

4) we moved -2x from the right side of the equation to the left side, as a maths rule its minus sign changed into a plus sign, and then we added 18x with 2x to get 20x.

5) we moved +7 to the left side of the equation and its plus sign became a minus sign, so +7 became -7, then -5 and -7 added, as a maths rule two negatives add each other, to become -12