+0

# Help. ​

0
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4
+1146

Help.

NotSoSmart  Sep 19, 2017
Sort:

#1
+79671
+1

y -100x  = 200

Ih he sells no computers, x  =0  .....so....

y  - 100 (0)  = 2000

y  = 2000

3x  - 3y   = 15          divide through by 3

x  - y  = 5             add y to both sides  and subtract 5 from both sides

x - 5  = y

Associative property

CPhill  Sep 19, 2017
#2
+1146
0

so number 4 would be A?? or am i reading it backwards and it should be C??

NotSoSmart  Sep 19, 2017
#3
+79671
+2

Yep...."A"

Note that "C" isn't correct....if it was, we would have that

y  = 5 - x      add x to  both sides

y + x  = 5        rearrange

x + y  = 5        multiply through by 3

3x + 3y  = 15     and this isn't equivalent to  3x  -3y  = 15

CPhill  Sep 19, 2017
#4
+1146
+1

ok thanks!!

NotSoSmart  Sep 19, 2017

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