Odpowiedź:
f) 1/7x=-2 |:1/7
x=-2*7/1
x=-14
g)b/3=45 |*3
b=135
h)7a+7=35 |-7
7a=28 |:7
a=4
[tex]f)\\\\\frac{1}{7}x = -2 \ \ /\cdot7\\\\x = -14[/tex]
[tex]g)\\\\\frac{b}{3} = 45 \ \ /\cdot3\\\\b = 135[/tex]
[tex]h)\\\\7a + 7 = 35\\\\7a = 35-7\\\\7a = 28 \ \ /:7\\\\a = 4[/tex]
