7-x=15
7-(-8)=15
what we have to do in order to solve this is change the 2 subtraction signs into a addition sign because a negative plus a negative makes a positive.
Answer:
x = 20
Step-by-step explanation:
The angles are same side interior angles so the add to 180
3x-10 + 5x+30 = 180
Combine like terms
8x +20 =180
Subtract 20 from each side
8x+20 -20 =180-20
8x = 160
Divide by 8
8x/8 =160/8
x = 20
20% of $40 is $8-$5=$3 or $40-$5=$35 and 20% of $35 is $7. Based on this math you would want to apply the 20% discount first.
Let's simplify step-by-step.
−4x−5−7+x+16
=−4x+−5+−7+x+16
Combine Like Terms:
=−4x+−5+−7+x+16
=(−4x+x)+(−5+−7+16)
=−3x+4
Answer:
=−3x+4
Answer:
When x = -2 or when x = 7
Step-by-step explanation:
x+2 is a factor in the denominator. If x = -2, the factor becomes zero.
x-7 is a factor in the denominator. If x = 7, the factor becomes zero.
We can't have zero as a factor in a denominator because division by zero is not defined. It doesn't have any meaning.
