Где схема?кинь сначала схему
3(3,8х+4,3х-5,7х-8)=48
3,8х+4,3х-5,7х-8=16
2,4х-8=16
2,4х=16+8
2,4х=24
х=10
1. 15 * (a — 4) = 42 + 8 * (a — 4)
15a — 60 = 42 + 8a — 32
15a — 8a = 10 + 60
7a = 70; a = 10;
2. (y + 1) * 18 = 36 + 12 * (y + 1)
18y + 18 = 36 + 12y + 12
18y — 12y = 48 — 18
6y = 30; y = 5;
3. (k + 5) * 7 — 54 = (k + 5) * 4
7k + 35 — 54 = 4k + 20
7k — 4k = 20 + 19
3k = 39; k = 13;
4. 17 * (c — 2) — 36 = 19 + (c — 2) * 12
17c — 34 — 36 = 19 + 12c — 24
17c — 12c = —5 + 70
5c = 65; c = 13.
<span>48-(70:2+13)=0</span>
<span>1)70:2=35</span>
<span>2)35+13=48</span>
<span>3)48-48=0</span>
<span><span>420+80:5*2=452</span></span>
<span><span>1)80:5=16</span></span>
<span><span>2)16*2=32</span></span>
<span><span>3)420+32=452</span></span>
12*(32-28):2=24
1)32-28=4
2)12*4=48
3)48:2=24
<span> (2600 - 1000):4-392=8</span>
<span>1)2600-1000=1600</span>
<span>2)1600:4=400</span>
<span>3)400-392=8</span>