Question

201.Найдите корень уравнения:
1) 4(x - 6) = x - 9
2) 6 - 3(x+1) = 7 - 2x
3) (8x + 3) - (10x + 6)
4) 3,5 - x = 8(x + 2,8)
5) 0,3(6-2y) = 4,5 - 0,7(y + 9)
6)3/5(7/9x-1/3)= x - 2 1/3

202.Решите уравнение
1) 8(5 - 3x) = 6(2 - 4x) + 7
2)5(x - 12) = 6(x - 10) - x

Answer 1

$1)4(x-6)=x-9\\4x-24=x-9\\4x-x=-9+24\\3x=15\\x=5\\2)6-3(x+1)=7-2x\\6-3x-3=7-2x\\3-3x=7-2x\\-3x+2x=7-3\\-x=4\\x=-4\\3)(8x+3)-(10x+6)=8x+3-10x-6=-2x-3\\4)3,5-x=8(x+2,8)\\3,5-x=8x+22,4\\-x-8x=22,4-3,5\\-9x=18,9\\x=-2,1\\5)0,3(6-2y)=4,5-0,7(y+9)\\1,8-0,6y=4,5-0,7y-6,3\\1,8-0,6y=-1,8-0,7y\\-0,6y+0,7y=-1,8-1,8\\0,1y=-3,6\\y=-36\\6)\frac{3}{5}*(\frac{7}{9}x-\frac{1}{3})=x-2\frac{1}{3}\\\frac{7}{15}x-\frac{1}{5}=x-\frac{7}{3}\\7x-3=15x-35\\7x-15x=-35+3\\-8x=-32\\x=4$