Basically 1/2 equals 2 and times x equals 2x. X is a variable an unknown number so 2x +4 and that's how you get your answer
5 C + 3 < 28 a - 4 C - 214
a>9c +31
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28. 4
C >28a-21
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9
2
Here is the explanation: 2 (17x+2)
Answer:
3x-2y-2=0
3x-2y+10=0
Step-by-step explanation:
let the slope of the line be 'm'
and also 

we know the formula for finding slope 

The equation of the line will be as,

Ah, ok
RST
so RS+ST=RT
6x+12=72
minus 12 both sides
6x=60
divide both sides by 6
x=10
x=10