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3 years ago

The sum of 3 times a number and 7 is 25

Mathematics

2 answers:

Maru [420]3 years ago

7 0

Answer: your answer would be 15+3*1+7=25

Step-by-step explanation: 15+3 makes 18

18*1=18

18+7=25

hammer [34]3 years ago

5 0

Mathematically written:

3 * x + 7 = 25

3x + 7 = 25

3x = 25 - 7

3x = 18

x = 18 / 3

x = 6

Proof:

3 * 6 + 7 = 25

18 + 7 = 25

25 = 25 → both sides of the equation are equal, our answer is correct

Notes:

A number - Is an unknown number, called a variable, which in this case is substituted by the letter x.

Hope it helped,

BioTeacher101

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