1.) solve x - 9 = -12
-) solve 2t + 7 = -1

1)x=3

2)t=-4

Step-by-step explanation:

x-9=-12

x=3

2t=-8

t=-4

x=-3;  t=-4

Step-by-step explanation:

1) x - 9 = -12

x=-12+9

x=-3

2.

2t + 7 = -1​

2t=-1-7

2t=-8

t=-4

64p2rh.e.x

step-by-step explanation:

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)