Answer:
B
Step-by-step explanation:
Answer:
Step-by-step explanation:
Given 
To make A as the subject of the formula we need to rearrange
Divide by 
throughout we get
Answer:
x=0
y=7
Step-by-step explanation:
Divide 6x-4y=-28 by -2..... -3x+2y=14
3x+5y=35
-3x+2y=14
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7y=49
y=7
6x-4*7=-28
x=0
Answer:
40.9
Step-by-step explanation:
add all the sides
Answer:
B) {x| x<-12 or x>-6}
Step-by-step explanation:
-2/3x>8
change -2/3 as -3/2 and multiply both sides by -3/2x
-2/3x•(-2/3)x<-3/2•8
calculate
reduce
x<-3•4
multiply numbers
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x<-12
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now we're done with the first equation, let's do the other equation to find the answer!
-2/3x<4
multiply both sides by -3/2 and again change -2/3 by -3/2
-3/2•(-2/3)x>-3/2•4
calculate
reduce
x>-3•2
multiply numbers
----------
x>-6
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