7.5 = x +

equals
x = 6.
First, subtract

from both sides. / Your problem should look like: 7.5 -

= x.
Second, simplify 7.5 -

to 6. / Your problem should look like: 6 = x.
Third, switch sides. / Your problem should look like x = 6, which is your answer.
The answer is 10............
Answer:
See Below
Step-by-step explanation:
First, isolate x. To do that add 3.5 to each side
x - 3.5 = -3.1
+3.5 +3.5
x= 0.4
Answer:
-10
Step-by-step explanation: