2)dada a funcao f(x)=4x-5,encontre o valor de x para que a)f(x)=6 b)f(x)=-3 c)f(x)=8 d)f(x)=-8. e)f(x)=-4 f)f(x)=1/5. g)f(x)=-7/2. h)f(x)=5/3
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f(x) = 6
4x - 5 = 6
4x = 11
x = ¹¹/₄
f(x) = -3
4x - 5 = -3
4x = 2
x = ²/₄
x = ¹/₂
f(x) = 8
4x - 5 = 8
4x = 13
x = ¹³/₄
f(x) = -8
4x - 5 = -8
4x = -3
x = ⁻³/₄
f(x) = - 4
4x - 5 = -4
4x = 1
x = ¹/₄
f(x) = ¹/₅
4x - 5 = ¹/₅
MMC = 5
20x - 25 = 1
20x = 26
x = ²⁶/₂₀
x = ¹³/₁₀
f(x) = ⁻⁷/₂
4x - 5 = ⁻⁷/₂
MMC = 2
8x - 10 = -7
8x = 3
x = ³/₈
f(x) = ⁵/₃
4x - 5 = ⁵/₃
MMC = 3
12x - 15 = 5
12x = 20
x = ²⁰/₁₂
x = ⁵/₃