B) 7x – 4 = x — 16; d) 5x + (3x — 7) = 9; f) (7x + 1) -(6x + 3) = 5;

1) 7x — 4 = x — 16
2) 13 — 5x = 8 — 2x
3) 0,2(x — 3) – 1 = 0,5(x +3) – 0,4
4) 12 = (7x — 9) — (11 — x)​

1) 7x – 4 = x – 16

2) 13 – 5x = 8 – 2x

3) 1,3p – 11 = 0,8p + 5

4) 0,71x – 13 = 10 – 0,29x

5) 3,1(1 – 3t) + t = 0,4(t – 14)

6) 2 = (3x – 5) – (7 – 4x)

3) x+7

x+7_y-5

+

4

x+10

3

= -1,

2

y+8

5

= 4;

1)9+4x=8x-9

2)2(7+9x)=-6x+2

3)10-3(1-7x)=-4x-8

4)-2x+1+5(x-2)=-4(3-x)+1

5)(x-6)^2=(x-3)^2

a) 7(5a +8)-11a;

6) 4(y-3)-4y+15;

B) 13a-8(7a-1).

1)3x+4= 15x-20

2)(7x-5)*2=20

3)1,2x+30=0,8x-20

4)15x-10x+15=4x-10

5)x+2/3 — 2x-3/9=2

-3(2x+3y)+7(-2x+4y)= -(7a+b)-8a-3b)=
-2(3x-1)+3(5-7x)=
-4(a-1)-5(2+a)=
7(x-4)-3(5+3x)=

8.
=
Упростите выражения.
a) 13x + 16x = (13+16)x =
6) 3b + 8 =
B) a+a+a =
r) 48p — 27p =
A) 20x + x =
e) 13a + 5a — a=​

a) 21 + 8:2 =
b) 3.5 — 8 =
c) 143:11 + 7 =
d) 13.5 — 47 =
e) 99 · 11 – 7.41 =
g) 315:3.4 + 12 =
h) 512 — 129 — 8:3 =
f) 34 : 2 + 7 · 14 =
i) 19.5 + 72:3.5 =
j) 4.17 — 21 — 4:7-7.6 =​

5) -5m + 24 = m;
814. 1) 12a — 1= -a + 25;
3) 8 + 3b = -7 + 2b;
5) 3y — 3 = 5 — y;
15. 1) 2x + 3 = x — 6;
1
-​