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3 years ago

Determine the missing number in the equation 13-2=12-?

Mathematics

1 answer:

soldier1979 [14.2K]3 years ago

5 0

For the equation to work, you have to have the same number on both sides of the equal sign

so to find ?, you can do:

13 - 2 = 12 - ? Simplify

11 = 12 - ? Subtract 12 on both sides

-1 = - ? Multiply -1 on both sides

1 = ?

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Answer:

the cost of one hot chocolate is $2.

Step-by-step explanation:

Let x be the hot chocolate cost and y be the newspaper cost.

Given:

A newspaper and three hot chocolates cost $7

So, the equation is

$3x+y=7$ --------(1)

Two newspapers and two hot chocolates cost $6

So, the second equation is.

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Therefore, the cost of one hot chocolate is $2.

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3 years ago

Determine the missing number in the equation 13-2=12-?​

Determine the missing number in the equation 13-2=12-?