Answer:
.4
Step-by-step explanation:
you subtract the 3 from the left side and also the right leaving you with 10x=4. you then divide the 10 from both sides and you get x=4/10 which can simplify to 2/5 in decimal it is .4
The value of 2x is 4/5
10x + 3=7
10x = 7 - 3
10x = 4
x = 4/10
x = 2/5
Value of 2x:
2x = 2(2/5) = 4/5
