а) (2х - 3) + (9х +16)=19
2x – 3 + 9x + 16 = 19
2x + 9x = 19 – 16 + 3
11x = 6
x = 6/11
х=0,54545454545
б) 2,8 + (1,8х + 3,2) - (5,6 + 0,1х) = 5,5
2.8 + 1.8x + 3.2 – 5.6 – 0.1x = 5.5
1,8x – 0,1x = 5,5 + 5,6 – 3,2 – 2,8
1.7x = 5.1
x = 3
а) (2х - 3) + (9х +16)=19
2x – 3 + 9x + 16 = 19
2x + 9x = 19 – 16 + 3
11x = 6
x = 6/11
х=0,54545454545
б) 2,8 + (1,8х + 3,2) - (5,6 + 0,1х) = 5,5
2.8 + 1.8x + 3.2 – 5.6 – 0.1x = 5.5
1,8x – 0,1x = 5,5 + 5,6 – 3,2 – 2,8
1.7x = 5.1
x = 3