Try Photomath big dawg its what i use for math like that
A. 3g, g=2/5
3(2/5)=6/5
B. 5-s, s=2
5-2=3
C. 2b-1, b=4/3
2(4/3)-1=
8/3-1=5/3
D. h+3/4, h=1/4
1/4+3/4=1
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