Question

Resolva as equações do 1°grau
6-4×= -5× -12
12+6× -3=2× +4 3×
28+12× -4× = 2-19+7×
- × -5x+246=6× +x +348
14+85a-348 -78a= 349-6a+3a-3a
64b-31+ 35b=789+36b+1+62b
124-6m+6 +5m=0
P+3p-18-5p=18+36-2p
3k+5k-678= -670-2k+2 -5k
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Answer 1

Resposta:

a) 6-4×= -5× -12

-4x +5x = - 6 - 12

x = - 18

b)12+6× -3=2× +4 3×

6x - 2x - 3x = - 12 +3 +4

x = - 5

c) 28+12× -4× = 2-19+7×

12x - 4x - 7x = - 28 - 12 +2 - 19

x = - 57

d) - × -5x+246=6× +x +348

-x -5x - 6x - x = 348 - 246

-13x = 102

x= 102/(-13)

e) 14+85a-348 -78a= 349-6a+3a-3a

85a - 78a +6a - 3a + 3a = - 14 +348 +349

13x = 683

x= 683/13

f) 64b-31+ 35b=789+36b+1+62b

64b +35b - 36b - 62b = 31 + 789 +1

x = 821

g) 124-6m+6 +5m=0

-6m +5m = - 124

-m = - 124

m = 124

h) P+3p-18-5p=18+36-2p

p +3p - 5p+2p = 18 + 18 +36

x = 72

i) 3k+5k-678= -670-2k+2 -5k

3k +5k +2k +5k = 678 - 670 +2

15x = 10

x =10/15