The answer is 9 because 5*(-3)+8+9-(-7)=9
200 times. Because 1000 divided of 5 is 200. You could divide it using the algorithm.
x = 130 is your answer
130 - 20 = 110
Since line E and F are parallel and are straight lines, we know both angles will add up to 180°
110 + 70 = 180
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