Question

me ajudem com algumas contas por favor

A) 5x+3=4x+9

B) 3y+7=2y=1

C)8m+2=6m=4

D) 3x+1=x+1

E) 5n+3=4n+9

Answer 1

A) 5x + 3 = 4x + 9

5x - 4x = 9 - 3

x = 6
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B) 3y + 7 = 2y + 1

3y - 2y = 1 - 7

y = -6

C) 8m +2 = 6m + 4

8m - 6m = 4 - 2

2m = 2

m = 1
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D) 3x + 1 = x + 1

3x - x = 1 - 1

2x = 0

x = 0
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E) 5n + 3 = 4n+9

5n - 4n = 9 - 3

n= 6

Answer 2

A) 5x+3=4x+9==> 5x-4x = 9-3==> x = 6

B) 3y+7=2y=1 ==> 3y-2y = 1-7==> x = - 6

C)8m+2=6m+4 ==> 8m-6m = 4-2==> 2m = 2 ==> m = 1

D) 3x+1=x+1 ==> 3x-x = 1-1==> 2x = 0 ==> x = 0

E) 5n+3=4n+9==> 5n-4n = 9-3 ==> n = 6