Sue solved an equation incorrectly, as shown below:

step 1: 7x = 28
step 2: x = 28 − 7
step 3: x = 21

which statement best explains why step 2 is incorrect in sue's solution?

she did not multiply 28 seven times.
she did not divide 28 by 7.
she did not multiply 28 by 7.
she did not add 7 to 28.

She did not divide 28 by 7.  

Step-by-step explanation:

You do the inverse of multiplication which is division. You do not subtract.  

7x = 28

7        7

x = 4

Sorry I'm late!

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.

∡ eia and ∡ kij are congruent

step-by-step explanation: