(7x+9)-(11x-7)=8
7x + 9 – 11x + 7 = 8
7x – 11x = 8 – 7 – 9
-4x = -8
x = 2
0,4(6-4t)=0,5(7×3t)-1,9
раскроем скобки
2.4-1.6t = 10.5t-1.9
-12.1t+4.3 = 0
12.1t-4.3 = 0
12.1t = 4.3
t = 0.35537190082645
(7x+9)-(11x-7)=8
7x + 9 – 11x + 7 = 8
7x – 11x = 8 – 7 – 9
-4x = -8
x = 2
0,4(6-4t)=0,5(7×3t)-1,9
раскроем скобки
2.4-1.6t = 10.5t-1.9
-12.1t+4.3 = 0
12.1t-4.3 = 0
12.1t = 4.3
t = 0.35537190082645