Question

determine a solução das equações abaixo h)4×-12=× i)×+6=0,5× j)8×-7=2×+5 k)5×+21=10×-19 l)7×+23-×=2×+20 m)10+(×-2)=5-(×=4) n)2×+(5×)=3+6 o)4 (×-2)-2 (×+1)=7 p)10 (×+3)=-10 f)2 (×-2)+3 (2×+2)=-5 (2-×) r)×+3 (×-1)-2-3 (×-3)=0

Answer 1

Resposta:

• h) 4x-12 = x
• 4x-x = 12
• 3x = 12
• x = 4
• i) x+6 = 0,5x
• x-0,5x = -6
• 0,5x = 6
• x = -12
• j) 8x-7 = 2x+5
• 8x-2x = 5+7
• 6x = 12
• x= 2
• k) 5x+21 = 10x-19
• 5x-10x = -19-21

• -5x = -40

• x= 8
• l) 7x+23-x = 2x+20
• 6x+23 = 2x+20
• 6x-2x = 20-23

• 4x = -3

• m) 10+(x-2) = 5-(x=4)
• Questão impossivel de resolver.

• n) 2x + (5x) = 3 + 6
• 2x+5x=9
• 7x = 9

• o) 4(x-2)-2(x+1)=7
• 4x - 8 - 2x - 2 = 7
• 2x - 10 = 7
• 2x = 7+10
• 2x= 17
• x= 17 sob 2 >> 17/2
• p) 10 (x+3) = - 10
• x+3= - 1
• x= -1 - 3
• x= - 4
• f) 2(x-2)+3 (2x+2) = - 5 (2-x)
• 2x-4+6x+6 = 10-5x
• 8x+2 = 10-5x
• 8x+5x= 10-2
• 13x = 8
• x = 8 sob 13 >> 8/13

• r)  x+3(x-1)-2-3(x-3)=0
• x+3x-3-2-3x+9 = 0
• x + 4 = 0
• x = -4