Mathematics
Grade10
Easy

Question

Solve the following using the substitution method and find the value of x and y:
-4y = -4
-5x = 15

  1. -3, -1 
  2. 3, -1
  3. -3, 1
  4. 1, 2

The correct answer is: -3, 1


    space minus 3 space comma 1 space i s space t h e space c o r r e c t space c h o i c e
g i v e n space e q u a t i o n
minus 4 y space equals space minus 4 space space...... left parenthesis a right parenthesis
a n d space minus 5 x space equals space 15 space space..... space left parenthesis b right parenthesis
l e t apostrophe s space s o l v e space b o t h space e q u a t i o n
minus 4 y space equals space minus 4
d i v i d e space b y space minus space 4 space f r o m space b o t h space s i d e
fraction numerator negative 4 y over denominator negative 4 end fraction equals fraction numerator negative 4 over denominator negative 4 end fraction
y space equals space 1
l e t s space s o l v e space e q u a t i o n space left parenthesis b right parenthesis
minus 5 x space equals space 15
x space equals space fraction numerator 15 over denominator negative 5 end fraction
x space equals space minus 3
left parenthesis x comma y right parenthesis space colon space left parenthesis negative 3 comma space 1 right parenthesis space comma space i s space t h e space a n s w e r

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