Вправи: 452

452. Розв’яжи рівняння. Знайди суму їх коренів.

5x – x + 4 = 12;

4х + 4 = 12;

4х = 12 – 4;

4х = 8;

х = 8 : 4;

х = 2.

241а – 125а – 16а = 56 + 44;

100а = 100;

а = 100 : 100;

а = 1.

18p – p + 92 = 9187;

17р = 9187 – 92;

17р = 9095;

р = 9095 : 17;

р = 535.

57с + 13с – 20с + 640 = 16 • 40;

50с + 640 = 640;

50с = 640 – 640;

50с = 0;

с = 0.

16k + 24k + 56 = 96;

40k = 96 – 56;

40k = 40;

k = 40 : 40;

k = 1.

5s + 12s + 23s – 15s = 32000 : 20;

25s = 1600;

s = 1600 : 25;

s = 64.

32p – 18p + 2 = 100;

14p = 100 – 2;

14p = 98;

p = 98 : 14;

p = 7.

83m – 7m – 16m – 10m + 50 = 125 • 8;

50m = 1000 – 50;

50m = 950;

m = 950 : 50;

m = 19.

2 + 1 + 535 + 0 + 1 + 64 + 7 + 19 = 629.