Question

1)4x+1=m
2)5(1-x)=3(2-7x)

Answer 1

1) 4x+1=m
4x=m-1
x=(m-1)/4

2)5(1-x)=3(2-7x)
5-5x=6-21x
-5x+21x=6-5
16x=1
x=1/16
x=0,0625

Answer 2

$\displaystyle a). 4x+1=m \\ 4x=m-1 \\ x= \frac{m-1}{4} \\ b).5(1-x)=3(2-7x) \\ 5-5x=6-21x \\ -5x+21x=6-5 \\ 16x=1 \\ x= \frac{1}{16}$