Question

me ajuda por favor
urgente ☢️☢️☢️☢️⚠️⚠️⚠️⚠️⚠️⚠️​

Answer 1

Resposta:

$1)\\a) 5m + 2x\\5 . 2 + 2. 3\\10 + 6 = 16\\\\b) 5m + 2x\\5 . 4 + 2.(-7)\\20 -14 = 6\\\\c) 5m + 2x\\5 (-4) + 2. 9 \\-20 + 18 = -2\\\\2) 2x + 15 = 49\\2x = 49 - 15\\x =\frac{34}{2} \\x = 17\\\\3)\\a) 8a + 2a = 10a\\b)7x - 2x = 5x\\c)(3x - 2y) + (7x + y) = 10x -y\\d)- (8a+4)-(3a+2) = -8a-4-3a-2= -11a-6\\e)(x+y+z)+x-(3y+z)=x+y+z+x-3y-z= 2x-2y\\f)(m+2n) -(r-2n)-(n+r)=m+2n-r+2n-n-r=m+3n-2r\\\\4)\\a)2x+5-5x=-1\\5+1=5x-2x\\x=\frac{6}{3} \\x=2\\\\b)5+6x=5x+2\\6x-5x=2-5\\x=-3$

c) x + 2x - 1 - 3 = x

3x - x = 4

x = 4/2

x = 2

d) -3x + 10 = 2x + 8 + 1

-3x -2x = 9 - 10

-5x = -1

x = -1/-5

x = 0,2

Bons estudos! Espero ter ajudado!