Q: If a plus b equals c and b plus c equals d and c plus d equals e and a equals 7 and e equals 5 what is a plus b plus c plus d plus e equal?

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35

3x plus -5 equal 7. so x is 4 so 3times 4 is 12-5 will equal 7.

144

144

It equals 24.

59

5 plus 3 plus 7 does equal 5 plus 7 plus 3; this is an example of the commutative property of addition. Therefore, the statement is true.

This equation is not possible. Two plus three plus four plus five does not equal 287. The system has no solution.

9 plus 7 equals 144. Generally, x plus y = x(x+y).

It doesn't ! -7 plus -5 equals -12 ! -7 plus 5 equals -2

144

89

3 plus 7 equals 10

5

144

144

w=10

7+2+5= 14 35 42

If 2 + 3 = 5 = 10(base 5), then 9 + 7 = 16 = 31(base 5).

0

144 This works if you first add the two digits (ex. 2+3=5), then multiply the first digit by the answer you got (2+5=10).

7 Times 7 Equals7 plus 7 plus7 plus7 plus7 plus7 plus 7, or 7 times 7, equals 49.

27

96

Look at it this way: If p = 1, then 7p = 7. What plus 7 equals -3? Adding 7 to -10 would equal -3, so all we have to figure out is what times 5 would equal -10. 5 times -2 would equal -10 so q equals -2.