3.5a²b³a³b⁴c*(-2/7)abc³ = 3.5 * (-2/7) * a²a³a * b³b⁴b * cc³ =<span>-a⁶b⁸c⁴
</span>1) 3.5x³ - 2.5x³ = 0.5x³(7 - 5) = 0.5x³ * 2 = x³
2) 1/7ab + 2/3ab = ab(1/7 + 2/3) = ab(3/21 + 14/21) = ab * 17/21 = (17/21)ab
1) у+4-у+1=6у
5=6у
6у=5
у=5/6
2) 6х-7х+12=101
-х+12=101
-х=101-12
х= - 89
(1/5)^(5-x)=125
5^(x-5)=5^3
x-5=3
x=8.
(а² + ах)/х : (а +х)/х² = (а(а + х)/х) ×(х²/(а + х) = ах