\(150:50-\left(x+1\right)=7.\\ \Leftrightarrow3-\left(x+1\right)=7.\\ \Leftrightarrow x+1=-4.\\ \Leftrightarrow x=-5.\)
`150 : 50 - (x + 1) = 7`
`3 - (x + 1) = 7`
`x + 1 = 3 - 7 `
`x + 1 = -4`
`x=-4-1`
`x=-5`
150 : 50 - (x + 1) = 7
3 - (x + 1) = 7
x + 1 = 3 - 7
x + 1 = -4
x = (-4) - 1
x = -5
vậy x = -5