Step-by-step explanation:

Assuming that you mean 5x(2-3) for your equation, you would just have to plug 2 into where x is. This makes your equation 5*2(2-3). This gives you 10(-1) because 5*2=10, and 2-3=-1. Then simply multiply the two to get:
-10
Hope this helped!
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Answer:
0.35
Step-by-step explanation:
.5x.7