Answer: 
Step-by-step explanation:
Reformatting the input :
Changes made to your input should not affect the solution:
(1): Dot was discarded near "7.".
<u>STEP 1: </u>
Simplify 
<u>The equation at the end of step 1:</u>

<u>Multiplying exponential expressions:</u>
2.1
multiplied by

Final result is 
Answer:
7m-3x-1
10x+26
7x-12
Step-by-step explanation:
3m - 1 + 4m -3x
sum terms by the same variable:
3m+4m=7m
we have:
7m-3x-1
7(3+2x)-4x+5
apply the distributive property:
7*3+7*2x-4x+5
we have:
10x+26
3x+4(x-3)
apply the distributive property:
3x+4*x-12
we have:
7x-12
Hope I was able to help :-)
Well Jay has 20 phone numbers.
20j=13r-3x2 im not sure but i hope that helped a little.