(x+5)*a=30
ax+5a=30|/a
x+5=30/a|-5
x=25/a
ax+5a=30/:a
x+5=30/a/-5
x=30/a-5
x=30-5/a
licze na naj ;d
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(x+5)*a=30
ax+5a=30|/a
x+5=30/a|-5
x=25/a
(x+5)*a=30
ax+5a=30/:a
x+5=30/a/-5
x=30/a-5
x=30-5/a
x=25/a
licze na naj ;d