Question

X+30=40
30-20+2x=10
3x-10+13= -2x+28
20x-30=40+30-2
5x+45-89=-90+41
10x-20=40+50

Gente me ajuda por favor, eu preciso das contas dessas equações, por favor

Answer 1

A) x + 30 = 40
x = 40 - 30
x = 10

B) 30 - 20 + 2x = 10
2x = 10 - 30 + 20
2x = - 20 + 20
2x = 0
x = 0/2
x = 0

C)3x - 10 + 13 = - 2x + 28
3x + 2x = 28 + 10 - 13
5x = 38 - 13
5x = 25
x = 25/5
x = 5

E)20x - 30 = 40 + 30 - 2
20x = 70 - 2 + 30
20x = 68 + 30
20x = 98
x = 98/20
x = 4,9


F)5x + 45 - 89 = - 90 + 41
5x = - 49 - 45 + 89
5x = - 94 + 89
5x = - 5
x = - 5 / 5
x = 1

G)10x - 20 = 40 + 50
10x = 90 + 20
10x = 110
x = 110/10
x = 11

Answer 2

X+30=40
X=40-30
X=10


30-20+2X=10
2X=10-30+20
2X=0
X=0/2



3X-10+13=-2X+20
3X+2X=20+10-13
5X=30-13
X=17/5


20X-30=40+30-2
20X=40+30-2+30
20X=70-2+30
20X=68+30
20X=98
X=98/20

5X+45-89=-90+41
5X=-90+41-45+89
5X=-5
X=-5/5
X=-1


10X+20=40+20
10X=40+20-20
10X=40
X=40/10
X=4