Solve using the substitution method:
NOTE: Round long decimals to the nearest one hundredth.
y = 3x - 87
3x 2y = 21
- x=-21.67
y=21.99 - x=21.67
y=-21.99 - x=21.67
y=21.99 - x=-21.99
y=-21.67
If y = 3x - 87, then the following is true per the substitution method:
3x 2(3x - 87) = 21
3x 6x - 174 = 21
9x = 195
x = 21.67
y = 3(21.67) - 87
y = -21.99
More question: