Question

Me ajudem pfv

1) x+4x-85=456-7x

2) 5x+46=8x+500

3)8-9+5x+8x=4+3+10x

Answer 1

1)

x + 4x - 85 = 456 - 7x

x + 4x + 7x = 456 + 85

12x = 541

x = 541 / 12

x ≅ 45,08

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2)

5x + 46 = 8x + 500

8x + 500 = 5x + 46

8x - 5x = 46 - 500

3x = - 454

x = 454 / 3

x ≅ -151,33

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3)

8 - 9 + 5x + 8x = 4 + 3 + 10x

5x + 8x -10x = 4 + 3 - 8 + 9

3x = 8

x = 8 / 3

x ≅ 2,67

Answer 2

Oi

a) x + 4x - 85 = 456 - 7x

x + 4x + 7x = 456 + 85

12x = 541

x = 541/12

b) 5x + 46 = 8x + 500

5x - 8x = 500 - 46

- 3x = 454 ⇒( × por -1)

3x = - 454

x = - 454/3

c) 8 - 9 + 5x + 8x = 4 + 3 + 10x

5x + 8x - 10x = 4 + 3 + 9 - 8

3x = 8

x = 8/3

Espero ter ajudado.