Question

Me ajudem : (preciso das contas da equaçao)..

1- 5x-40=2-x
2 -20+6x=2x+28
3- 3,5x+1=3+3,1x
4 -7p+15-5p-10=-17+13p
5 -5-a-11=4a-21
6- 2y+21-6y=-12+y-7
7- 3(x-2)-(1-x)=13
8- 6(4-t)-55=-5(2t+3)

9-Agora simplifique as fracões(COM AS CONTAS)
A)3/1.1/5 B) 1/3.3/5 C) 2/3 . 1/3 D)4/3 . 3 E)8/6 . 5 F)7/5.5/7

Answer 1

1) 5x-40 = 2-x
5x+x = 2+40
6x = 42
x = 42÷6
x = 7

2) -20+6x = 2x+28
6x-2x = 28+20
4x = 48
x = 48÷4
x = 12

3) 3,5x+1 = 3+3,1x
3,5x-3,1x = 3-1
0,4x = 2
x = 2÷0,4
x = 5

4) -7p+15-5p-10 = -17+13p
-7p-5p-13p = -17-15+10
-25p = -22
p = -22÷-25
p = 0,88

5) -5-a-11 = 4a-21
-a-4a = -21+11+5
-5a = -5
a = -5÷(-5)
a = 1

6) 2y+21-6y = -12+y-7
2y-6y-y = -12-7-21
-5y = -40
y = -40(÷-5)
y = 8

7) 3(x-2)-(1-x) = 13
3x-6-1+x = 13
3x+x = 13+6+1
4x = 20
x = 20÷4
x = 5

8) 6(4-t)-55 = -5(2t+3)
24-6t-55 = -10t-15
-6t+10t = -15-24+55
4t = -39+55
4t = 16
t = 16÷4
t = 4