4x-10=30

2n-7=30

S/3+2=4

x=10 n=18.5 s=6

Step-by-step explanation:

4x-10=30

Add 10 to both sides

4x-10+10=30+10

4x=40

Divide by 4 on both sides

(4x) / 4=40/4

x=10

2n-7=30

Add 7 to both sides

2n-7+7=30+7

2n=37

Divide by 2 on both sides

(2n) / 2=37/2

n=18.5

(s/3) + 2=4

Subtract 2 from both sides

(s/3) + 2-2=4-2

(s/3) = 2

Multiply by 3 on both sides

3s/3=2*3

s=6