а) 7(1,4х+1,8)-27,6=10,1х
9.8x + 12.6 – 27.6 = 10.1x
9,8x – 10,1x = 27,6 – 12,6
-0.3x = 15
x = -50
б)-7(0,3х-8)+3(0,4х+5)=59,5
– 2.1x + 56 + 1.2x + 15 = 59.5
– 2,1x + 1,2x = 59,5 – 15 – 56
-0.9x = -11.5
-9x = -115
x = -115/-9
х=12,7777777778
а) 7(1,4х+1,8)-27,6=10,1х
9.8x + 12.6 – 27.6 = 10.1x
9,8x – 10,1x = 27,6 – 12,6
-0.3x = 15
x = -50
б)-7(0,3х-8)+3(0,4х+5)=59,5
– 2.1x + 56 + 1.2x + 15 = 59.5
– 2,1x + 1,2x = 59,5 – 15 – 56
-0.9x = -11.5
-9x = -115
x = -115/-9
х=12,7777777778