What on earth is 7 + √(x - 1) = 2?
I'm confused...

x = 26

Step-by-step explanation:

Let's go step by step.

Check your answer.

That clearly doesn't work, showing how it has no solution.

^The answer above explained it better than me :P

I am assuming that you are looking for x...

7 + √(x - 1) = 2

You must isolate x. To do this you must first subtract 7 to both sides:

7 - 7 + √(x - 1) = 2 - 7

0 + √(x - 1) = -5

√(x - 1) = -5

Now you must get rid of the square root. The opposite order of operation of the square root is squaring. Square both sides of the equation:

(√(x - 1) )² = (-5)²

x - 1 = 25

Now add 1 to both sides to fully isolate x

x - 1 + 1 = 25 + 1

x = 26

Now you must check that this is true:

7 + √(26 - 1) = 2

7 + √(25) = 2

7 + 5 = 2

12 ≠ 2

This is not true which means that this equation has NO solution

Hope this helped!

~Just a girl in love with Shawn Mendes

answer: 21$

step-by-step explanation:

$42 / $14 = 3   (ratio 3: 1)

$7 x 3 = $21

phosphate, calcium ion, chloride ion, neon atom

step-by-step explanation: