Question

encontre O Conjunto Das Equações Abaixo

2 (x+6) = 4 ( ×+2)

4 (×+3) =20

10 - 2 (×+3) = 8+3 ( 2×+5)

2×+10=×+20

×+2 (×+5) =40+2×

Answer 1

1. 2(x+6) = 4(x+2)
2x+12 = 4x+8
12-8 = 4x-2x
4 = 2x
x = 4÷2
x = 2

2. 4(x+3) = 20
4x + 12 = 20
4x = 20 - 12
4x = 8
x = 8÷4
x = 2

3. 10-3(x+3) = 8+3 (2x+5)
7(x+3) = 11 (2x+5)
7x+21 = 13x+55
7x = 13x+55-21
7x = 13x+34
-34 = 13x-7x
-34 = 6x
-34.(-1) = 6x
34 = 6x
x = 34÷6
x = 28

4. 2x+10 = x+20
2x-x = 20-10
x = 10

5. x+2 (x+5) = 40+2x
2x (x+5) = 40+2x
2x+2x+10 = 40+2x
4x+10 = 40+2x
4x-2x = 40-10
2x = 30
x = 30÷2
x = 15

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