16х1/8+2х(-1/6)=2-1/3=1 2/3
6a/7c - (36a²+49c²)/42ac + (7c-36a)/6a=
= 6a*6a/42ac -(36a²+49c²)/42ac + (7c-36a)*7c / 42ac =
(36a²-36a²-49c²+49c²-252ac) / 42ac=
=-252/42 = - 6
3√20- √5= 3√4×5 -√5=6√5-√5=6
2/3√18+2√2= 2√2 + 2√2 = 8<span>
2√27-√12= 2</span>√3×9 -√4×3 = 6√3-2√3= 4<span>
2√20-2√45+1/4√16= 2</span>√5×4 - 2√9×5 + 1 = 4√5-6√5+1= -1<span>
5√8+1/2√2-2√18= 5</span>√4×2 +0.5√2-2√9×2= 10√2 +0.5√2 - 6√2=21 - 6√2
кажется
136+2-5-119-4m
-4m=-136-2+5+119
-4m=-14
m=-14:-4
m=3 2/4
1. -1/2x=1-3
-1/2x=-2
x=4
2. 3x-5x=3+5
-2x=8
x=-4