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3 years ago

Please help...

Mathematics

1 answer:

julsineya [31]3 years ago

7 0

Answer:

a. Step 1

Step-by-step explanation:

When solving equations, in order to isolate the variable (get the 'x' by itselt), you need to use inverse (opposite) operations. In the equation:

l2x - 4l - 3 = 3

Step 1: l2x - 4l = -3 + 3 *this step is incorrect because the inverse of subtraction is addition so the '-3' should be added to both sides:

l2x - 4l - 3 + 3 = 3+ 3

Step 2: l2x - 4l = 6

Step 3: 2x - 4 = 6

Step 4: 2x = 10

Step 5: x = 5

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Step-by-step explanation:

Given: $\text{U}=\left \{\text{q, r, s, t, u, v, w, x, y, z} \right \}$ , $\text{A}=\left \{\text{q, s, u, w, y} \right \}$ , $\text{B}=\left \{\text{q, s, y, z} \right \}$ ,

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Solution:

We have,

$\text{U}=\left \{\text{q, r, s, t, u, v, w, x, y, z} \right \}$

$\text{A}=\left \{\text{q, s, u, w, y} \right \}$

$\text{B}=\left \{\text{q, s, y, z} \right \}$

$\text{C}=\left \{\text{v, w, x, y, z} \right \}$

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