Question

me ajudem nessas questoes
quero a operscao inversa
a] x+9,3=25,9
b]2,4x-4,9=1,7x
c]2x-16=9
d]4x-107=x+1

Answer 1

a) x+9,3=25,9
x=25,9-9,3
x=16,6
b) 2,4x-4,9=1,7x
2,4x-1,7x=4,9
0,7x=4,9
x=4,9/0,7
x=7
c) 2x-16=9
2x=9+16
2x=25
x=25/2
x=12,5
d) 4x-107=x+1
4x-x=1+107
3x=108
x=108/3
x=36