Question

Me ajuda a fazer essas equaçãos com conta por favor * X+30=40 * 30-20+2x=10 * 3x-10+13= -2x+28 * 23x-16=14-17x * 10x-5(1+x)=3(2x 2-20) * 3-2(x+3)=x-18 * X=12 2 3 * 2x+5=1 5x 4 * X+3x-2=x-3 4 2 2 * 3(x-5)+2x-7 6 4 Obrigada

Answer 1

a)

x + 30 = 40

x = 40 - 30 = 10

b)

30 - 20 + 2x = 10

2x = 10 - 10 = 0

x = 0

c)

3x - 10 + 13 = -2x + 28

3x + 3 = -2x + 28

3x + 2x = 28 - 3

5x = 25

x = 5

d)

23x - 16 = 14 - 17x

23x + 17x = 14 + 16

40x = 30

x = 3/4

e)

10x - 5(1+x) = 3(2x + 2 - 20)

10x - 5 - 5x = 6x - 54

x = 49

f)

3 - 2(x + 3) = x - 18

3 - 2x - 6 = x - 18

3x = 15

x = 5

g)

x=12 2 3 * 2x+5=1 5x 4 (incompleta)

h)

2x+5=1 5x 4 (incompleta)

i)

x+3x-2=x-3 4 2 2  (incompleta)

j)

3(x-5)+2x-7 6 4   (incompleta)