Question

Questões primeiro grau:
A)x-36=-71
B)20=x+12
C)38=2x+10
D)2x+4=30
E)5x-12=23
F)9x-2=4x+18
G)2x-10+7x+10=180
H)7y-10=y+50
I)4x-18+3x=10
J)2x+5+x+7=18
K)5x-91=4x-77
L)7x+1=5x-7
M)4x+5=x+20
N)2x(x+5)-4=26
O)3(x+1)+2(2x-3)=5(x-1)+8
P)3(x+3)-5=22
Q)2(2x+7)+3(3x-5)=3(4x-5)-1

Answer 1

a) x = -71+36

x = -35

b) 20-12= x

x = 8

c) 38-10 = 2x

2x = 28

x = 28 / 2

x = 14

d) 2x = 30-4

2x = 26

x = 26 / 2

x = 13

e) 5x = 23+12

5x = 35

x = 35 / 5

x = 7

f) 9x - 4x = 18+2

5x = 20

x = 20 / 5

x = 4

g) 2x + 7x = 180-10+10

9x = 180

x = 180 / 9

x = 20

h) 7y - y = 50+10

6y = 60

y = 60 / 6

y = 10

i) 4x + 3x = 18 + 10

7x = 28

x = 28 / 7

x = 4

j) 2x + x = 18-5-7

3x = 6

x = 6 / 3

x = 2

k) 5x - 4x = -77+91

x = 14

l) 7x - 5x = -7-1

2x = -8

x = -8 / 2

x = -4

m) 4x - x = 20-5

3x = 15

x = 15 / 3

x = 5

n) 2x + 10 = 26+4

2x = 30-10

x = 20 / 2

x = 10

o) 3x + 3 + 4x - 6 = 5x - 5+8

3x + 4x - 5x = -5+8-3+6

2x = 6

x = 6 / 2

x = 3

p) 3x + 9-5 = 22

3x = 22-9+5

3x = 18

x = 18 / 3

x = 6

q) 4x + 14 + 9x - 15 = 12x - 15-1

4x + 9x - 12x = -15-1+15

x = -1