Question

15:26 .l LTE 11.3AB.pdf X Locked Nae Dae LESSCSolving Linear Systems by Adding or Subtracting 1-3Practice and Problem Solving: A/B Solve each system of linear equations by adding or subtracting Check your answer 1. 5y 10 2. xy-10 2x+5y-5 5x+y--2 4-3-7y 8 3. 4x+10y 2 4x+8y 16 3x-2y-44 5.x4y-15 3x+4y 3 6 4x+11y-5 4x-11y- 8 3x-5y-60 7. x-y- y-1 4x+Sy-4 Write a system of equations to solv 9. A plumber charges an inital amount to make a house call plus an houty rate for the time he is working A 1-hour job costs $i0 and a 3hour job costs $210. What is the initial amount and the hourly rate at the plumber charges? 10. A man and his three children spent $40 to attend a show. A second amly of three chidren and their two parents spert $53 for the same show. How much does a chid's ticket cos? He onew oge n Het n pws eoeesenean eotteo

Answer 1

solution. Given n.5%=10 o And 2n+s4= 5 u t to subtrae saty = -2 ting - (it -40 - 8 be -② 32 = 15 n=15 nam nos from equation o n. sy = 10 15-54 =10 -54 = lors -5y = 5 from equation o nty = :-) 2 +4 -12 y = -10-2 9 -12 I Elulna ① -37-74 = 8 - Add 34 - 2y = -44 - -gy = 36 12. - Add untloy = 2 ant8y = igy = 18 ya G=1 from equation ant loy=2 ant 10 = 2 una-8 from equation .-3n- 74 - 8 -3n - 7x4 = 8 - 34 - 28.-8 -Bu = a + 20 -3n = 36 (n=-12]

☺ - + 4y = is sub on t4y = tract tl ( o 10 un+14=56 Add 4 persy = -6 6+6=0 0 There is no solution. -yu = 12 * *2-3) from equation -nt 44 =15 - (-3) + 4y = is 3 +44 =15 4y = 15-3 44:=12 y = 12 30-54= 60 Add 4 utsty=-4 o . 7n=56 na sto ☺ -x-y/-) - Add-nty - - - -2.0 co nee from equation -n-y=1 ory=1 y = -1 from equation & 2 ч. Ч. 3x8 - sy=60 24-54= 60 -sy=60-24 -5y = 36 (y - 36

(9) the this question is: The content of not clear. (10) $ let child's ticket cost = x man ticket cost = y 6. w . y + 3x4 = 40 y + 3t = 40 - subtracting 24 t in .-.53 y=-3 y = 13 ) from equation 6, we get ytu = 40 13 +3n = 40 3n = 40-13't ona 27 na 27 Therefore, child's ticket cost & Answer