7x=10,5-3-1

7x=6,5

x=6,5/7

x=0,92

Ola joao

3x + 3 + 1 + 4x = 10.5

7x + 4 = 10.5

7x = 6.5

x = 6.5/7

pronto

7x +4=10.5

7x =10.5 - 4

7x=6.5

x=6.5/7 = 0.93

segundomodo

7x/1+4/1=105/10

mmc=10

70x+ 40=105

70x=105- 40

70x=65

x =65/70 = 13/14******