How do you simplify the expression by combining like terms?

15+12−5+4−7

17

Step-by-step explanation:

Since there is no variables in the equation they are all like terms. So just do addition or subtraction. But if it wants you to separate addition and subtraction the answer would be 31-12.

If this is for Imagine Math:

Question:

Simplify the expression by combining like terms.

15+12−5+4−7

7x +4y + 8

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions