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80 + 10 equals 90 so the missing value is zero, ie 80 + 10 = 90 - 0

Q: What makes the number sentence true 80 plus 10 equals 90- what makes it true?

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That word "equals" in there makes it an equation.

-10

80 - 10 = 30 + 40Both sides of the sum now equal 70.

3

The variable is x.

Related questions

That word "equals" in there makes it an equation.

60 - 20 = 20 + 20=============

-10

80 - 10 = 30 + 40Both sides of the sum now equal 70.

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