13 + 3 - 6 + 10 = 20 : answer if it is 3 minus 6 in the question.
13 + 3.6 + 10 = 26.6 : answer if it is a decimal 3.6.
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-10
80 - 10 = 30 + 40Both sides of the sum now equal 70.
1 plus negative 10 is equal to -9.
That word "equals" in there makes it an equation.
positive 10