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Assuming that this question is about solving
3/5x = 12
Multiply both sides by 5x: 3 = 60x
Divide both sides by 60: 3/60 = x
or 1/20 = x
No. x=3. (5x3 is 15 or 5x =15-3=12)
3/3-x
5x over 4 = 3 + 3 over 4 = 15 over 4 5x over 4 = 15 over 4 times both sides by 4 5x = 15 divide both sides by 5 x = 3
5x-3 = 37 5x = 37+3 5x = 40 x = 8
5x - 3 + x - 9 = 5x Bring like terms together of the left side: 5x + x - 3 - 9 = 5x Combine like terms: 6x - 12 = 5x Add 12 to both sides: 6x = 5x + 12 Subtract 5x from both sides: x = 12
No. x=3. (5x3 is 15 or 5x =15-3=12)
3/3-x
5x + 3 = -12 5x =-12-3 =-15 x = -3
5x over 4 = 3 + 3 over 4 = 15 over 4 5x over 4 = 15 over 4 times both sides by 4 5x = 15 divide both sides by 5 x = 3
5x-3 = 37 5x = 37+3 5x = 40 x = 8
(1) 5x+y=-12 (2) 7x-3y=-30 From (1) one gets y = -12-5x Put into (2) 7x-3y = 7x -3 (-12-5x) = 7x + 36 +15 x = 22x +36=-30 22x = -30-36 = -66 so x = -3 and y=-12-5x = -12-5x-3= 3 The solution is (-3,3)
5x - 3 + x - 9 = 5x Bring like terms together of the left side: 5x + x - 3 - 9 = 5x Combine like terms: 6x - 12 = 5x Add 12 to both sides: 6x = 5x + 12 Subtract 5x from both sides: x = 12
(3)(2)(2)5x=60 12(5x)=60 12(5x)/12=60/12 5x=5 x=1
2x2 - 5x + 12 does not factor. 2x2 - 5x - 12 factors into (2x + 3)(x - 4) 2x2 + 5x - 12 factors into (2x - 3)(x + 4)
There is a formula for the "difference of squares." In this case, the answer is (5x + 3)(5x - 3)
12
5x - 3 = 12 Add 3 to both sides: 5x = 15 Divide both sides by 5: x = 3