1)9-4х=3х-40
– 4x – 3x = – 40 – 9
-7x = -49
x = 7
2)0,3 (8-3у)=3,2-0,8 (у-7)
2.4 – 0.9y = 3.2 – 0.8y + 5.6
– 0,9y + 0,8y = 5,6 + 3,2 – 2,4
-0.1y = 6.4
y = -64
1)9-4х=3х-40
– 4x – 3x = – 40 – 9
-7x = -49
x = 7
2)0,3 (8-3у)=3,2-0,8 (у-7)
2.4 – 0.9y = 3.2 – 0.8y + 5.6
– 0,9y + 0,8y = 5,6 + 3,2 – 2,4
-0.1y = 6.4
y = -64