Question

If 5 add to thrice an integer is -7 find the integer

Answer 1

3x +5=-7
3x=-7-5=-12
x=-12/3=-4

Answer 2

Concept: A linear equation in one variable is an equation that has only one solution and is expressed in the form ax+b = 0, where a and b are two integers and x is a variable.

Given: 5 is added to thrice an integer equals -7

To find: the integer

Solution: Let us suppose the integer as x

According to question,

thrice an integer means 3x

5 is added to thrice an integer means

5 + 3x which is equal to -7

Therefore, the equation becomes

5 +3x = -7

3x = -7 -5

3x = -12

x= -4

Hence, the integer is -4.

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