2x-3(5/3 - x/3)=-17 distribute the -3 across the terms in the parentheses
2x - 5 + x = -17 simplify
3x - 5 = -17 add 5 to both sides
3x = -12 divide by 3 on both sides
x = -4
If x = 53 -y, then the first equation, x + y = 53, becomes
(53 - y) + y = 53
53 = 53
And there is nothing to solve....
Hit the "2nd" button...you will see "asin" "acos' "atan"
The EXACT value is ±(4√484).....there is nothing more we can do....
4x-y+3=0 add y, subtract 3 from both sides
4x = y - 3 divide both sides by 4
x = [ y - 3 ] / 4
DVKCOHEJ, BVF SHWR DVTMQRERG QRWRQ 1
CONGRATS, YOU HAVE COMPLETED LEVEL 1
Is this it, Takahiro???
A (a-21)=100 divide both sides by A
a - 21 = 100/A add 2 to both sides
a = 100/A + 21
948 = 700 + 210 + 35 + 3
So
700/7 + 210/7 + 35/7 + 3/7 =
100 + 30 + 5 + 3/7 =
135 + 3/7
So.....948/7 ≠ 135
If 2/3 of the cards she received were from girls, then 7 boys must represent the other 1/3.
7/ (1/3) = 21 and that's the total number of cards she received.
Then, 21 other students in her class - plus hereself - equals 22 students.
(1/2)N + 5 = 9 subtract 5 from both sides
(1/2)N = 4 multiply both sides by 2
N = 8
