Answer:
8.5
Step-by-step explanation:
2x + 3 = 20
minus 3 from both sides
2x = 20-3= 17
2x=17
divide by 2
x = 8.5
Let x be the mysterious number. So...
Subtract both sides by 3:
2x = 17
Divide both sides by 2:
x = 17/2
