Solve for X and Y ..s
show me the steps. please
2006-11-13 13:33:34 · 7 answers · asked by NoNome 2 in Science & Mathematics ➔ Mathematics
its so e z
2006-11-13 13:41:47 · answer #1 · answered by Dae`ja 3 · 0⤊ 0⤋
solve by substitution method
x-3 =-3x + 25
+3 +3
x = -3x+28
+3x +3x
4x =28
/4 /4
X = 7
SECOND STEP SOLVE FOR Y USING FIRST EQUATION
Y = x-3
Y =7-3
Y =4
2006-11-13 21:45:22 · answer #2 · answered by Barbara H 2 · 0⤊ 0⤋
Y= x - 3
y = -3x + 25 use y=y
x-3=-3x+25 add 3x to each side
4x-3=25 add 3 to each side
4x=28 divide by 4
x=7
substitute
y=7-3
y=4 solution is (7,4)
check
4=-3(7)+25=25-21=4
2006-11-13 21:42:36 · answer #3 · answered by yupchagee 7 · 0⤊ 0⤋
since y=x-3
can you solve the equation on the right by plugging in x-3 for y?
x-3= -3x + 25 ?
solve for x and then use that info for solving one of the equations for y
2006-11-13 21:37:36 · answer #4 · answered by gggjoob 5 · 1⤊ 0⤋
y=x-3 & y=-3x+25
x-3=-3x+25
x+3x=25-3
4x=22
x=11/2=5.5
y=x-3=5.5-3=2.5
2006-11-13 21:37:55 · answer #5 · answered by 6 · 1⤊ 0⤋
(7,4)
x-y=3 ------------eqn1
3x+y=25----------eqn2
by rearranging the given equations
adding eqn1 and eqn2
we get 4x=28
x=7
and subsituting it in eqn we have y=4
2006-11-13 21:47:01 · answer #6 · answered by junaid4u_84 1 · 0⤊ 0⤋
( 7 , 4 )
2006-11-13 21:35:21 · answer #7 · answered by Habester 3 · 0⤊ 0⤋