Question

20=(-2×/5+9)+(-×/5+5)•(-4/5-1) e tudo isso dividido por 2

Answer 1

20= ((-2X/14) -(X/10) x (-1))/2

20= ((-2X/14 + (x/10))/2

20= ((-10X + 7X)/70)/2 

20= (-3X/70) x  1/2

20= -3X/140

-3X=2800

X= - 933,33