Step-by-step explanation:
x+y=5
3x-2y+5=0
3x-2y= -5
x+y=5...... equation 1
3x-2y= -5....... equation 2
there fore make x the subject of the formula in equation 1
x=5-y.. equation 3
substitute equation three in equation 2
3(5-y)-2y=-5
15y-3y-2y=-5
10y=-5
divide both sides by 10
y=-5/10
y=-½
substitute y into equation 1
x+(-½)=5
x=5+½
x=5½
x=5½,y= -½
The scientific notation is a method that scientists use
to easily handle very large numbers or very small numbers. As an example,
instead of writing down the value 0.0000000065, we write the value 6.5 x 10-9
in scientific notation. The number of places the decimal point got moved
becomes the exponent of the number 10. When the movement is from left to right,
the exponent is negative (for very small numbers). When it is right to left,
the exponent is positive (for very large numbers).
Therefore writing estimated measurements in scientific
notation:
length of a grain of salt : 0.0002 centimeters = 2 x 10-4
centimeters
width of a key ring : 0.02 centimeters = 2 x 10-2
centimeters
Your answer is -9x I'm 100% sure
I hope this helps
Answer:
x=4
Step-by-step explanation:
−2(4 − 2x) + 3x = 2x + 2(5 + x) − 6 (<u>DISTRUBUTE</u>)
-8+4x+3x=2x+10+2x-6 <u>(SIMPLFY</u>)
-8+7x=4x+4 (<u>SUBTRACTE 4X FROM BOTH SIDES</u>)
3x-8=4 (<u>ADDD 8 TO BOTH SIDES</u>)
3x=12 (<u>DIVIDE MY 3 ON BOTH SIDES</u>)
x=4
