The sum of 3 times a number and 7 is 25
2 answers:
Answer: your answer would be 15+3*1+7=25
Step-by-step explanation: 15+3 makes 18
18*1=18
18+7=25
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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