Explicație pas cu pas:
a). 1.5+x= -7.5
x= -9
b). y- 5/6 = 1/2
y= 1/2 + 5/6
amplificam
y=3/6+5/6
y=8/6
simplificam pt ca fractia sa fie ireductibila
y=4/3
c). -7/2 × x = 0.5
x= 0.5 ÷ (-7/2)
0.5 = 5/10 = 1/2
x= 1/2 × (-2/7)
x= -1/7
d). y÷5/6 = 17/2
y= 17/2 × 5/6
y = 85/12