6a-2b=8a=6c
2a+b=8b+6d
6c-2d=-3a-c
2c+d=-3b-d
find x
9x + 25 = 13x - 19
5x + 7 = 8x - 71
In a 2-digit number, the unit's digit is 3 greater than the ten's digit. If the number is 4 times as large as the sum of its digit...
VOLUME OF CUBOID IN U SHAPE
4x - 7 = 7x - 61
7x-5y=40
2x-3y=-48
½×^x
-2x-3y=-48