2x+3=10
Simplify to the nearest term.

x = 4.

Step-by-step explanation:

2x + 3 = 10.

Simplify 3 - 10 = -7.

2x = -7.

Divide 2x = -7 to 4.

Hope this helps!

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x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

part a: 1.08

part b: 27.59