Answer:
x=20
Step-by-step explanation:
4x +10 = 90
-10 from both sides
that gives you 4x=80
80 divided by 4 gives you 20=x
Answer:
The value of X = 9
Step-by-step explanation:
X+13=22
X = 22-13
X = 9
Step-by-step explanation:

- Line a & b are parallel
- m ∠ 8 = 150 °


[ Sum of co-interior angles ]
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Don’t lesson to that link guy it’s virus robot
Suppose x books are produced by both methods.
Total cost for method 1 = 60346 + 10.5x
Total cost for method 2 = 18682 + 21x
Cost of method 1 = Cost of method 2
60346 + 10.5x = 18682 + 21x
60346 - 18682 = 21x - 10.5x
41664 = 10.5x
x = 41664/10.5
x = 3968
For 3968 books produced the cost by both methods will be the same.