Question

resolva a equação polinomial do primeiro grau

a) 2 x -15 = x + 45

b) 4 x + 5x = 90

c) 4 x = 5x + 240

d) 4 x + 10 =2x + 50

ajuda ❤️​

Answer 1

a) 2x - x = 45 + 15
x= 60
b) 9x = 90
x= 10
c) -x=240
x= -240
d) 2x = 40
x=20

Answer 2

$a)2x - 15 = x + 45$

$2x - x = 45 + 15$

$\boxed{ x = 60}$

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$b)4x + 5x = 90$

$9x = 90$

$x = \frac{90}{9}$

$\boxed{ x = 10}$

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$c)4x = 5x + 240$

$4x - 5x = 240$

$- x = 240$

$\boxed{ x = - 240}$

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$d)4x + 10 = 2x + 50$

$4x - 2x = 50 - 10$

$2x = 40$

$x = \frac{40}{2}$

$\boxed{ x = 20}$

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Att, IzabelaCristina2006 ❤️