When you are solving equations like this, you simply need to remember to combine like terms and isolate the variable to one side or the other.
1. 2x-17=4 (Add 17 to both sides....the left cancels out the -17) 2x= 21 (divide both sides by 2) x = 10.5
2. (10x+5) + (6x-1) = 180 (combine like terms....the parentheses are there to just group them into different terms) 16x+4 = 180 (subtract 4 from both sides) 16x = 176 (divide each side by 16) x = 11
3. 3x + 4 = 2x - 1 (isolate the variable to one side, let's go with the left and subtract 2x from both sides) x + 4 = -1 (subtract 4 from both sides) x = -5
4. <span> 2(x + 4) = x + 13 (apply the distributive property to the parentheses) 2x + 8 = x + 13 (isolate the variable to the left side and subtract x) x + 8 = 13 (subtract 8 from both sides) x = 5
</span><span>5. 14x = 2(5x + 14) (apply distributive property to the right side) </span> 14x = 10x + 28 (isolate the variable to the left, subtract 10x) 4x = 28 (divide both sides by 4) x = 7
Hope all the steps are clear and you can see why each step was taken. Good luck!
No matter the number of times you rolled the dice, the probability of getting a number is always 1/6. But here we can choose 4 numbers ( 1 to 4) hence the probability P( 1 or 2 or 3 or 4) = 4/6 2/3 = 0.6667 = 66.67% (A)
