Question

Решите уравнение: 14х-9х=125, 15у+25у=120, 13х+5х=108: 2, 29у-17у=12*4

Answer 1

1.
$14 x- 9 x= 125 \\ 5x = 125 \\ x = 125 \div 5 \\ x = 25$

2.
$15y + 25y = 120 \\ 40x = 120 \\ x = 12 \div 40 \\ x = 3$

3.
$13x + 5x = 108 \div 2 \\ 13x + 5x = 54 \\ 18x = 54 \\ x = 54 \div 18 \\ x = 3$

4.
$29y - 17y = 12 \times 4 \\ 12y = 48 \\ y = 48 \div 12 \\ y = 4$

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Answer 2

14х-9х=125
5х=125
х=125:5
х=25

15у+25у=120
40у=120
у=120:40
у=3

13х+5х=108:2
18х=54
х=54:18
х=3

29у-17у=12*4
12у=48
у=48:12
у=4