1) 0.3(x–2)=0.6+0.2(x+4)
0.3x–0.6=0.6+0.2x+0.8
0.3x–0.2x=0.6+0.8+0.6
0.5x=2
x=2/0.5
x=4
2) x+25––1 корзина
y–15––2 корзина
x+25=y–15
y=3x
x+25=3x–15
2x=40
x=20––1 корзина
y=3x
y=3*20
y=60––2 корзина
4) (0.6–y)/9=(1.3–y)/4.5
(0.6–y)*4.5=(1.3–y)*9
2.7–4.5y=11.7–9y
4.5y=9
y=9/4.5
y=2