I've been working on it for an hour but I keep getting the wrong answer.
Here's the equation: x + 4 divided by 3, minus x -1 divided by 5 is less than or equal to 2.
The answer is 3.5, but I keep getting 23.5.
Please show me how to solve it.
Here's the equation: x + 4 divided by 3, minus x -1 divided by 5 is less than or equal to 2.
The answer is 3.5, but I keep getting 23.5.
Please show me how to solve it.
-
http://www.flickr.com/photos/dwread/8189…
-
I feel for you. Nothing more frustrating than going round in circles with a maths problem.
( (x+4)/3 ) - ( (x-1)/5 ) ≤ 2
Multiply both sides by 3 then 5:
5(x+4) - 3(x-1) ≤ 2(3)(5)
=> 5x - 3x + 20 -(-3) ≤ 30
=> 2x + 23 ≤ 30
subtract 23 from both sides:
=> 2x ≤ 7
divide both sides by 2:
=> x ≤ 3.5
**************
Copy these symbols to your profile to make asking maths questions easier if you like.
∫ Σ → ∞ Π Δ Φ Ψ Ω Γ ∮ ∇∂ ± ∓ √ ∛ ∅ °
α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ τ υ φ χ ψ ω
⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ⁺ ⁻ ⁿ ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ₊ ₋
⅓ ⅔ ⅕ ⅖ ⅗ ⅘ ⅙ ⅚ ⅛ ⅜ ⅝ ⅞
≡ ≈ ≅ ≠ ≤ ≥ · ~ ∤ ◅∈ ∉ ⊆ ⊂ ∪ ∩ ⊥ ô
( (x+4)/3 ) - ( (x-1)/5 ) ≤ 2
Multiply both sides by 3 then 5:
5(x+4) - 3(x-1) ≤ 2(3)(5)
=> 5x - 3x + 20 -(-3) ≤ 30
=> 2x + 23 ≤ 30
subtract 23 from both sides:
=> 2x ≤ 7
divide both sides by 2:
=> x ≤ 3.5
**************
Copy these symbols to your profile to make asking maths questions easier if you like.
∫ Σ → ∞ Π Δ Φ Ψ Ω Γ ∮ ∇∂ ± ∓ √ ∛ ∅ °
α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ τ υ φ χ ψ ω
⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ⁺ ⁻ ⁿ ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ₊ ₋
⅓ ⅔ ⅕ ⅖ ⅗ ⅘ ⅙ ⅚ ⅛ ⅜ ⅝ ⅞
≡ ≈ ≅ ≠ ≤ ≥ · ~ ∤ ◅∈ ∉ ⊆ ⊂ ∪ ∩ ⊥ ô
-
(x+4)/3 - (x-1)/5 <=2
5x+20-3x+3 <= 30
2x <= 7
x <= 3.5
5x+20-3x+3 <= 30
2x <= 7
x <= 3.5