Решение:
-8x+8=4-6x
-8x+6x=4-8
-2x=-4
x=2
y=4-6*2=-8
Ответ:
(2;-8)
Г)6.3*12/9=
*12/9= 63/10*12/9=7/10*12=8.4
#2
(80×3)+(80×3)=240+240=480 (км)
#3
2p-(3p-2p+c)=2p-3p+2-c
Решение
Sin (-11пи/4) = - sin[(12π/4) - π/4] = - sin(3π - π/4) = - sin(π/4) = - √2/2
<span>tg 17пи /6 = tg[(18</span>π/6) - π/6)] = tg(3π - π/6) = - tg(π/6) = - 1/√3