Answer: 4x+11
Step-by-step explanation: Distribute the negative to the -8 and -2x. This will make 2x+3+8+2x. Combine like terms and you will get 4x+11. Hope this helps!
Answer:
z = 70
x = 6
Step-by-step explanation:
Z and 70 are vertical angles so they are equal
z = 70
12x+38 and 70 are supplementary angles so they form a straight line
This means they add to 180 degrees
12x+38 + 70 = 180
Combine like terms
12x+108 = 180
Subtract 108 from each side
12x+108-108= 180-108
12x = 72
Divide each side by 12
12x/12 = 72/12
x = 6
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Answer:
$3
Step-by-step explanation:
Let the cost of a book and a pen be $b and $p respectively.
3b +2p= 8 -----(1)
5b +3p= 13 -----(2)
(1) ×3:
9b +6p= 24 -----(3)
(2) ×2:
10b +6p= 26 -----(4)
(4) -(3):
10b +6p -(9b +6p)= 26 -24
Expand:
10b +6p -9b -6p= 2
b= 2
Substitute b= 2 into (1):
3(2) +2p=8
6 +2p= 8
2p= 8 -6
2p= 2
p= 2 ÷2
p= 1
Total cost of one book and one pen
= $b +$p
= $2 +$1
= $3