3x+4y=11
4y=11-3x
Substituting this into x+4y=9
X+11-3x=9
-2x=9-11
-2x=-3
2x=3
X=3/2
Substituting this into x+4y=9
3/2+4y=9
4y=9-3/2
4y=18/2-3/2
4y=15/2
Y=15/2/4
Y=15/8
X=1 1/2
Y=1 7/8
Yes because 3x5 is the same as adding 3 five times or 3+3+3+3+3.
Step-by-step explanation:
The factorisation of 49b^2 - 81 is (7b - 9)(7b + 9). This is because 49 and 81 are the squares of 7 and 9 respectively, so these must be multiplied together. b^2 is b x b. Finally, it must be -9 and +9 to make -81, because when the signs are the same the result is a positive number
Ok so first you want to start off by defining the first number as x. Little tip: a consecutive ODD number will be two apart for the previous odd number. So it would be something like x + 2, x + 4 and so on.
So in this case I would make a key that would look something like this:
1: x
2:x+2
Now we need an equation. We now we need to add number 1 and number two so our equation, would be 2x + 2=168. Then you solve from there.
If you need help with solving this equation you can meeage me!
Answer:
14
Step-by-step explanation:
<h2><u>Solve for x</u></h2>
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this can be solved by square rooting 196
x = 14
<h3><u>the value for x is 14</u></h3>
