Proportions

Round One 2) x + 3 = 15

Answers 2.) x + 3 = 15 X=12 21

Round Two

Answers 54 1.)10x = -40 X=-4 2.)15x = -675 X=-45 3.)-12x = 504 X=42 4.)45x = 945 X=21 14

Round Three

Answers 1.)8(x-8)=8 8x-64=8 8x = 72 x = 9 2.)6(x-7)=-126 6x-42=-126 6x = -84 x = ) 64(x+10) = x+640 = x = 1664 x = 26 4.)28(x+9)=168 28x+252=168 28x = -84 x = -3 18

Round Four

Answers 27 1.)6(2x+9)=162 12x+54 = x = 108 x = 9 2.)14(3x+55)=560 42x+770 = x = -210 x = -5 3.)6(3x+5)=120 18x+30 = x = 90 x = 5 4.)21(2x+20)=42 42x+420 = 42 42x = -378 x = -9 0

Round Five

Answers 12 1.)18(x+4)=48(x-6) 18x+72 = 48x x = -360 x = 12 3.)35(x+19)=14(x+37) 35x = 14x x = -147 x = -7 4.)36(x+6) = 39(x+4) 36x+216=39x x = -60 x = 20 2.)1(x+14)=3(x+6) x + 14 = 3x x = 4 x = -2 23

Round Six

Answers 1.)15(3x)=90 45x = 90 x = 2 4.)3(2x) = 30 6x = 30 x = 5 3.)8x = 44 x = )-50x = 425 x =

Round Seven

Answers 1.)3(x+4) = 36 3x + 12 = 36 3x = 24 x = 8 4.) -2(5x) = x = 440 x = ) 25x = x = ) 3x = 2160 x =

Round Eight

Answers 1.)80(x+2)=640 80x = x = 480 x = 6 3.)2(x+1) = 12 2x + 2 = 12 2x = 10 x = 5 4.)30(2x+10)=900 60x+300=900 60x = 600 x = 10 2.)28(x+4)= x = x = 56 x = 2 23

Round Nine 1) x + 7 = 1 0 2) x – 3 = 1 2 3) x + 8 = 1 5 4) x – 2 = 2 7

Answers 1.)60(5x+12)= x +720 = x = 3600 x = 12 4.)54(3x-9)= x-486= x = 2430 x = 15 3.)30(x-2) =90 30x – 60 = 90 30x = 150 x = 5 2.)20(2x+5)=420 40x+100=420 40x = 320 x = 8 40

Round Ten 1) 5 + x = 1 5 2) 1 7 = x – 4 3) 1 9 = x + 7 4) X – 1 3 = 1

Answers 2.) 54(2x-1)=27(3x+3) 108x-54=81x+81 27x = 135 x = 5 1.)14(5x+5)=35(x+12) 70x+70=35x x = 350 x = 10 4.) 35(-4x-2)=14(5x+25) -140x-70=70x x = 420 x = -2 3.)18(4x+36)=36(-2x+6) 72x+648=-72x x = -432 x = -3 10