jevisabarcelone
Calculators
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
jevisabarcelone
jevisabarcelone
Home
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
MATH SOLVE
Home
General
7x - 2 = 2y 3x = 2y - 1 Solve the system of equations by substitution. (3/4, 13/8), (1/4, -1/8), no...
5 months ago
Q:
7x - 2 = 2y 3x = 2y - 1 Solve the system of equations by substitution. (3/4, 13/8), (1/4, -1/8), no solution, coincident
Accepted Solution
A:
7x - 2 = 2y
7x = 2y + 2
so
7x = 2y + 2
3x = 2y - 1
----------------subtract
4x = 3
x = 3/4
7x - 2 = 2y
7(3/4) - 2 = 2y
21/4 - 2 = 2y
21/4 - 8/4 = 2y
13/4 = 2y
so
y = 13/4 * 1/2
y = 13/8
answer
(3/4, 13/8)