That word "equals" in there makes it an equation.
80 + 10 equals 90 so the missing value is zero, ie 80 + 10 = 90 - 0
-10
3
The variable is x.
That word "equals" in there makes it an equation.
60 - 20 = 20 + 20=============
80 + 10 equals 90 so the missing value is zero, ie 80 + 10 = 90 - 0
-10
3
The variable is x.
5
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12 plus 0 is 12
three plus seven equals ten
10+30=70-30
3x + 8 = 4x + 23x - 4x = 2 - 8-x = -6x = 6