Question

ajudemmmm é para hoje​

Answer 1

a)

$2x+5-5x=-1\\2x-5x=-1-5\\-3x=-6\\x=\frac{(-6)}{(-3)}=2$

b)

$5+6x=5x+2\\6x-5x=2-5\\x=-3$

c)

$x+2x-1-3=x\\x+2x-x=1+3\\2x=4\\x=\frac{4}{2}=2$

d)

$-3x+10=2x+8+1\\-3x-2x=8+1-10\\-5x=-1\\5x=1\\x=\frac{1}{5}$

e)

$3x-2x=3x+2\\3x-2x-3x=2\\-2x=2\\x=\frac{2}{(-2)}=-1$

f)

$2x+3x+9=8(6-x)\\2x+3x+9=48-8x\\2x+3x+8x=48-9\\13x=39\\x=\frac{39}{13}=3$

g)

$3(2x+3)-4(x-1)=3\\6x+9-4x+4=3\\6x-4x=3-4-9\\2x=-10\\x=\frac{-(10)}{2}=-5$

h)

$2(3-x)=3(x-4)+15\\6-2x=3x-12+15\\-2x-3x=15-12-6\\-5x=-3\\x=\frac{(-3)}{(-5)}=\frac{3}{5}$

i)

$3(5-x)-3(1-2x)=42\\15-3x-3+6x=42\\-3x+6x=42-15+3\\3x=30\\x=\frac{30}{3}=10$