Coinciedent equations are the same equations but indifferent forms example 2x+3y=2 is coincident with 4x+6=4 (multilied by 2)
so we have 4x+5y=8 next one was have 8x we see that 4 times 2=8 so we just double the numbers 5 times 2=10 8 times 2=16 answer is 8x+10y=16 missing numbers are 10 and 16
subsitution meathod absicalyy since you have x=y+2, then subsitue y+2 for x in the equaiton x+y=6 so (y+2)+y=6 there fro the answer is D
d=desmond g=george
d is 3 less than g d=-3+g d=g-3 combinded scores equals 187 d+g=187
the equations are d=g-3 and d+g=187 the answer is B
child tikcet is 2 dollars so number of children times cost per child=cost c times 2=cost=2c
adult tickets are same but differenc cost 6 times a=6a
so number of adults+number of kids=total number of people c+a=38
cost of adults+cost of kids=total cost 2c+6a=148
the equations are c+a=38 and 2c+6a=148 the answer is A
the solution is in the form (x,y) so solv for x and y 5x-3y=-9 2x-5y=4 multily the first equation by -2 and the second equaiton by 5
-10x+6y=18 10x-25y=20 add them together
-10x+6y=18 <u>10x-25y=20 + </u>0x-19y=38<u> </u>-19y=38 divide both sides by -19 y=-2 subsitute 5x-3y=-9 5x-3(-2)=-9 5x+6=-9 subtract 6 from both sides 5x=-15 dvide by 5 x=-3
x=-3 y=-2 solution is (-3,-2)
ANSWERS missing numbers are 10 and 16 D B A (-3,-2)
1) Solve using elimination Multiply the first equation by 2 and the second by 5 so you can figure out x 10x-6y=-18 10x-25y=20 Subtract the two equations 19y=-28 y=-2 Plug y into the equation and you get x=-3 (-3, -2) 2. C Just model the equation 3. B Again, it's all about turning the word problem into equations 4. D. Use substitution and plug the x into the first equation. 5. Multiply the whole first equation by 2. You can see that because 4*2=8 8x+10y=16 Hope this helps.
