Question

como resolve as EQUAÇÕES :
A) 2(-2x+3)-5(2-x)=3(2x+3)

B) -2(X-5)-3(2X+7)=10-X

C)3X-2X+5/3=10

D) 3Y-5/2-Y+5/3=5

Answer 1

A) 2(-2x+3)-5(2-x)=3(2x+3) 
-4x + 6 -10 + 5x = 6x + 9
-4x + 6 -10 + 5x -6x -9 = 0
-5x +5 = 0
-5x = -5
x = 5/5
x = 1

B) -2(X-5)-3(2X+7)=10-X
-2x + 10 - 6x  -21 = 10 - x
-2x + 10 - 6x  -21 -10 + x = 0
-7x -21 = 0
-7x = 21
x = -3

C)3X-2X+5/3=10
9x/3 - 6x/3 + 5/3 = -30/3
3x = 30 - 5
x = 25/3

D) 3Y-5/2-Y+5/3=5
18y/6 - 15/6 - 6y/6 + 10/6 = 30/6
12y = 30 -10 +15
y = 45/12