\(\Rightarrow4x+x=\left(-75\right)+15\)
\(5x=\left(-50\right)\)
\(x=\left(-50\right)\div5\)
\(x=-10\)
4x - 15 = (-75) - x
4x + x = (-75) - 15
5x = -60
x = (-60) : 5
x = -12
Xin lỗi mình làm sai.
4x - 15 = (-75) - x
4x + x = (-75) + 15
5x = -60
x = (-60) : 5
x = -12