Question

equações de 1 grau
a) 3×=15
b)-7×-1 = 48
c)x/3=-7
d)3x-4=2x+8
e) 4x=-12
f)-3x=-15
g)-40=-5x
h)x/5=2 ​

Answer 1

⁃ a) 3×=15

⁃ x = 15/3

⁃ x = 5

• b)-7×-1 = 48
• -7 = 49
• x =- 49/7
• x = -7

⁃ c)x/3=-7

⁃ x = -7 × 3

⁃ x = -21

• d)3x-4=2x+8
• 3x = 2x + 12
• 3x - 2x = 12
• x = 12

⁃ e) 4x=-12

⁃ x =- 12/4

⁃ x = -3

• f)-3x=-15
• x = -15/-3
• x = 15/3
• x = 5

⁃ g)-40=-5x

⁃ -40/-5 = x

⁃ 40/5 = x

⁃ x = 8

• h)x/5=2
• x = 5 × 2
• x = 10