Answer:
3x+8y=-5-equatin.1
-2x+2y=18-equation.2
now,
subtracting both equation.1 by equation.2,then
3x+8y=-5
-8x+8y=72
+ - -
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What is 2/5 divided 5
2 answers:
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Answer:
Step-by-step explanation:
Question One
Multiply through by 2
2*1/2 * (2x + y ) = 21/2 * 2
Combine
2x + y = 21
Subtract 2x from both sides
y = 21 - 2x
Now equate the two given equations
y = 21 - 2x
y = 2x
Add 2x to both sides
2x = 21 - 2x
2x + 2x = 21
4x = 21
x = 21/4
x = 5 1/4
or
x = 5.25
Question 2
multiply numerator and denominator of the second fraction by (x + 2)
Remove the numerator brackets in the right hand fraction. Look out for the minus sign.