Răspuns:
a)
[tex] \frac{1}{2} x + 0.3 = 1[/tex]
[tex] \frac{1}{2} x = 1 - 0.3[/tex]
[tex] \frac{1}{2} x = 0.7[/tex]
x = 1,4
b)
[tex] \frac{1}{4} x - 1.5 = 2[/tex]
[tex] \frac{1}{4} x = 2 + 1.5[/tex]
[tex] \frac{1}{4} x = 3.5[/tex]
x = 14
c)
[tex] \frac{3}{4} b - 2 = 4.3[/tex]
[tex] \frac{3}{4} b = 4.3 + 2[/tex]
[tex] \frac{3}{4} b = 6.3[/tex]
[tex]b = 8.4[/tex]
d)
[tex]7 - \frac{5}{2} x = 2.8[/tex]
[tex] - \frac{5}{2} x = 2.8 - 7[/tex]
[tex] - \frac{5}{2} x = - 4.2[/tex]
[tex] \frac{5}{2} x = 4.2[/tex]
x = 1,68
e)
[tex] \frac{1}{2} + 8y = 6[/tex]
[tex]8y = 6 - 0.5[/tex]
8y = 5,5
y = 0,6875
f)
[tex]3 = 5x - \frac{3}{2} [/tex]
[tex]3 + 1.5 = 5x[/tex]
[tex]5x = 4.5[/tex]
x = 0,9
g)
[tex] \frac{7}{20} a - 1 = 27.7[/tex]
[tex] \frac{7}{20} a = 27.7 + 1[/tex]
[tex] \frac{7}{20} a = 28.7[/tex]
a = 82
h)
[tex]8 - \frac{3}{4} m = 7.1[/tex]
[tex]8 - 7.1 = \frac{3}{4} m[/tex]
[tex] \frac{3}{4} m = 0.9[/tex]
m = 1,2
